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microstrip layout - can the path be branched?


erformance (such as type of trace bends or extra pads in the output rf trace) so i am looking for suggestions on a specific question.if i have an output 50 ohm microstrip line trace going to the chip antenna and id like to branch off from......
RF, Microwave, Antennas and Optics :: 22 Oct 2009 13:26 :: penneyj :: Replies: 10 :: Views: 273

planar array antenna-problem with connectors


hello everyonei have been working on planar array antenna using rotman lens.i could get the linear going ,but when i had to extend my antennas to two dimension.i have been having trouble with the size of the connectors.my array is individually fed.wi...
Electromagnetic Design and Simulation :: 02 Oct 2009 15:51 :: rotmanlens :: Replies: 0 :: Views: 90

sim340e b2b connector/antenna adapter cable


d i want to use sim340e gsm modem. unfortunately the board to board connector entery is not available to our local distributor :( can we go for other board to board connector for the module ? in the antenna part , we have a quad band gsm antenna wit...
Microcontrollers :: 30 Sep 2009 13:34 :: gsmman :: Replies: 0 :: Views: 63

effect of ground plane on uwb antenna


i have some serious doubts can anybody clarify these pls.1. effect of metallic ground plane on vivaldi antenna (i made some traveling slot antenna with 120 deg hpbw in both planes but in practical its not behaving as in simulations by hfss)..kindly p...
Electromagnetic Design and Simulation :: 25 Sep 2009 5:58 :: akedar :: Replies: 3 :: Views: 496

how is coplanar stripline fed in hfss


i am using hfss for simulating patch antennas (without ground planes). a center strip with two adjacent ground strips together constitutes feeding end of the antenna structure. practically this antenna will be fed by a coax, center pin of coax connec...
Electromagnetic Design and Simulation :: 22 Sep 2009 15:15 :: raks123 :: Replies: 0 :: Views: 144

pcb design help (315mhz with 1/4 wave dipole)


hi, i have never done rf layout before. this is a really simple board but i would like maximum range. :) i have a transceiver chip and antenna that are both matched at 50ohms and tuned for 315mhz. my problem is how to get a trace from chip to antenna...
RF, Microwave, Antennas and Optics :: 21 Sep 2009 17:22 :: biff44 :: Replies: 5 :: Views: 369

vivaldi antenna design


hi... im designing a dual-polarized vivaldi antenna which should operate between the frequency range of 2 to 12.6ghz. im using the stripline-line vivaldi notch antennas design. however, i still have many doubts even after reading various journals and...
Electromagnetic Design and Simulation :: 15 Sep 2009 6:49 :: aamnamasood :: Replies: 18 :: Views: 3227

2.4 ghz antenna connectors and alternatives


i am making a radio modem using one of those 2.4ghz transceivers. the maximum output power will be 20dbm. i am confused about the antenna. i really like to use a microstrip antenna for cost reasons but am worried(lack of knowledge) about the performa...
RF, Microwave, Antennas and Optics :: 03 Sep 2009 23:23 :: aadee :: Replies: 3 :: Views: 278

dac to pa - lan to adc - i/q


dear all,i need to design an add-on-board for frequency 1.2ghz to 6ghz.i need the add-on board with dac ->filters ->mixer (if)->pa - antenna on sma adc <--filters<--mixer(if)<--lnacan any on...
RF, Microwave, Antennas and Optics :: 01 Sep 2009 13:17 :: ragh1981 :: Replies: 0 :: Views: 105

coaxial to microstrip transition


hi,i need information regarding the connection of coaxial cable (sma edge mount) to microstrip line on a pcb.i saw that there is a tapering technique to maintain constant impedance from the sma connector to the microstrip but i didnt see literature a...
Electromagnetic Design and Simulation :: 14 Jul 2009 9:44 :: crucian :: Replies: 5 :: Views: 630

help me check my printed dipole antenna project using hfss!


hi all,i am a beginner with hfss. i have its verson 10. now, i try to design a printed dipole antenna using hfss. the project have been design alreadly but it seems that there maybe some problems. as can be seen from the s-parameter result figure in ...
RF, Microwave, Antennas and Optics :: 26 Jun 2009 10:38 :: hntko :: Replies: 6 :: Views: 498

antenna design w/o network analyzer :(


help!i am doing antenna design w/o vna. i just simulate my designs and fab them then hope for the best.and i havent seen even a glimmer of hope. i could send/receive data but it is not correct. we use a devkit and when the code is tested there, it se...
RF, Microwave, Antennas and Optics :: 22 Jun 2009 10:36 :: vpmedina :: Replies: 8 :: Views: 576

2.4ghz module to sma connector


excellent little 2.4ghz modules from radiocrafts that are surface mount, which i have put on a four layer pcb. the pcb will be inside a metal box and will therefore need to have something like a whip antenna. from doing lots of searching......
RF, Microwave, Antennas and Optics :: 16 Jun 2009 15:06 :: smiling84 :: Replies: 4 :: Views: 381

simulating only part of a trace in hfss


i am designing a feed system for a patch antenna. it is an sma connector leading to a trace. i am trying to look at only the input sma and the trace leading to the antenna, but i dont want to include the antenna because it takes a long time to sim...
Electromagnetic Design and Simulation :: 27 May 2009 1:27 :: EdmundZheng :: Replies: 3 :: Views: 369

umts yagi xp 15 dbi antenna cable replacement


helloi have umts yagi xp 15 dbi antenna ( http://www.bestpartner.biz/index.php?artid=20855 ) which is superb, but recently someone cut my cable.. which cable should i buy for replacement? can i join the old one with the new one?...
RF, Microwave, Antennas and Optics :: 24 May 2009 21:00 :: vfone :: Replies: 1 :: Views: 102

momentum


helloiwant to realize a patch antenna with an coax fed .i find an article with an sma connector i dont understand this sma .how to introduce this sma a momentum....
RF, Microwave, Antennas and Optics :: 18 May 2009 20:35 :: Jim cage :: Replies: 5 :: Views: 660

long range rfid reader dl810 for asset tracking


daily rfid has announced hf long range rfid reader dl810 with read range up to 90cm to cater for most hf applications. in addition, this long range rfid reader is suited for asset tracking since it featrues fast read rate up to 50 pcs per second.this...
Business Special Interest Group :: 15 May 2009 2:19 :: RFID_DAILY :: Replies: 0 :: Views: 415

need explanation - how connector works


hello everyone,i dont understand how the connector worksthe situation like this :-i design the antenna using sma connector and the impedance is 50 ohmhowever my supervisor change the impedance connector to 65 ohm and said that connector still can wor...
Electromagnetic Design and Simulation :: 13 May 2009 8:49 :: mauloftin :: Replies: 1 :: Views: 162

please clear my doubt on cable loss of an antenna


hi all,i am testing 2 parabolic dish (feedhorn antenna) . both dish are used as transmit and receive respectively.each dish is fixed with cable to the equipment. at the receiver, when i see the reading of -7.8dbm . this testing is done for 5ghz freq...
RF, Microwave, Antennas and Optics :: 21 Apr 2009 7:26 :: mauloftin :: Replies: 3 :: Views: 210

how to make sma connector in momentum


hi i want to simulate triangle of sierpinski monopole with momentum but i dont know how to make the sma connector ....
RF, Microwave, Antennas and Optics :: 08 Apr 2009 19:11 :: anil_21p :: Replies: 4 :: Views: 711

problem hfss / measure- room simualation in hfss


hi,im working on an uwb patch antenna, i have performed my structure using hfss but when i realise my structure i find it very different to practice i dont understand the real cause of this difference especially in the lower band so i repeat the simu...
Electromagnetic Design and Simulation :: 08 Apr 2009 14:53 :: boss492 :: Replies: 2 :: Views: 399

rf antenna microstrip consedration


ease see the attached pic below, http://www.edaboard.com/files-eboard/ant_1441.gifi wanna ask as the microstrip on the right hand side o f the board doesnt has a gnd plane is the placement ok ? . the antenna is a small ducky right angle to the plane ...
RF, Microwave, Antennas and Optics :: 02 Apr 2009 5:41 :: Azulykit :: Replies: 7 :: Views: 612

matching circuit help - results weren't as expected


hi all,i need to match 912mhz saw device to 50 ohms within its 10% fractional bandwidth, which has only 1 port. i have done the matching network design already. theoretically, it should work, as seen in attached pdf. then i optimized using ads layout...
RF, Microwave, Antennas and Optics :: 25 Mar 2009 18:38 :: kosolson2005 :: Replies: 7 :: Views: 699

sma connector in cst


can you please tell me how to design a sma connector in cst with 50 ohm impedence matching and the specifications to be followed for inserting wave guide port....
RF, Microwave, Antennas and Optics :: 25 Mar 2009 9:50 :: Abhishekabs :: Replies: 9 :: Views: 690

cst tutorial ???


hi,can anyone give me tutorial/manual file of microwave studio of cst?...
Electromagnetic Design and Simulation :: 24 Mar 2009 15:07 :: mauloftin :: Replies: 24 :: Views: 7342

rf unit / shielding enclosure / rf going through usb cable


hello!i think this the right place for my issue :-)ok, i got a 2.4ghz receiving rf unit with:- an rf part- a microcontroller part - an uart to usb circuit. i use an alubos enclosure. see http://www.bopla.de/en/product-catalog/enclosure-technology/pro...
RF, Microwave, Antennas and Optics :: 28 Feb 2009 10:08 :: jabidof :: Replies: 6 :: Views: 1929

how to model a probe fed patch antenna using cst


hi, i am currently working on a project which i need to design a probe-fed type circular patch antenna using cst mws (please see the attachment). i am trying to simulate the s11 parameter of the patch antenna but i do not know how to model the coaxia...
RF, Microwave, Antennas and Optics :: 27 Feb 2009 16:32 :: shahid78 :: Replies: 15 :: Views: 1065

how to connect sma with the aperture coupled antenna?


in order to feed an aperture coupled antenna, because the ground is sandwiched and covered totally, how to connect the ground to a sma connector? thanks!...
RF, Microwave, Antennas and Optics :: 20 Feb 2009 4:58 :: kspalla :: Replies: 1 :: Views: 153

measurement with agilent's high frequency probe 85024a


hi,have anybody worked with agilents high frequency probe 85024a along with 10:1 voltage divider?i am using this assembly to measure power at 2.4ghz in a 50 ohm system in parallel with antenna of 50 ohm impedance.kindly help me in calulating the corr...
RF, Microwave, Antennas and Optics :: 16 Feb 2009 11:39 :: vibhatomar :: Replies: 2 :: Views: 237

wilkinson power divider design question


i need to design a wilkinson power divider with a power division ratio of 1.96 at frequency 2.4 ghz. it needs to achieve good impedance matching with the return loss at each port needs to be less than 15 db and mutual isolation between two output po...
RF, Microwave, Antennas and Optics :: 10 Feb 2009 13:51 :: byteptr :: Replies: 15 :: Views: 2367

need help in quadridged waveguide simulation


hello friends,i am trying to simulate quad ridged waveguide in hfss.please find attached file.i found this example in one paper, where i got dimension & i implemented to see how it works.but in the paper there are results which plots graphs of s12 fo...
Electromagnetic Design and Simulation :: 02 Feb 2009 12:39 :: Abhishekabs :: Replies: 16 :: Views: 693

practical matching circuit


hi,ive build a microstrip antenna with a probe feed. ive manufactured the antenna and decided to build a matching circuit. ive taken the antenna s-parameters from the network analyzer and put it into ads. then ive build a lumped matching circuit usin...
RF, Microwave, Antennas and Optics :: 01 Feb 2009 14:08 :: Mazz :: Replies: 3 :: Views: 357

help with hfss: coaxial probe design


hello,i have simulated an coaxial-probe-fed antenna using specifications of 2.92mm air-insulator coaxial jack. i am trying to simulate the same antenna using specifications of a sma teflon-insulator coaxial jack. i was wondering if i have done it cor...
RF, Microwave, Antennas and Optics :: 24 Jan 2009 0:33 :: mortarman :: Replies: 4 :: Views: 378

antenna simulation versus measurement in ie3d


i have designed a planar patch array for 5.8 ghz using ie3d. when i got the first manufactured antenna back, as one could expect it was not a perfect match, and i need to do a re-spin. what i want to do is to adjust the simulation parameters so that ...
Electromagnetic Design and Simulation :: 15 Dec 2008 10:42 :: mengjom :: Replies: 0 :: Views: 249

antenna help


hello i have purchased a wouxun transceiver134 to 174 mhz. but, the seller gave me a 400 to 470 mhz high gain antenna. will there be any change in performance? can i make my own antenna using a coat hanger cut to the correct 1/4 length? th...
RF, Microwave, Antennas and Optics :: 31 Aug 2008 22:43 :: webdog :: Replies: 7 :: Views: 363

simulations of antenna


anyone can share with me some simulations of any antennas feed by sma connector using cst?...
Electromagnetic Design and Simulation :: 07 Aug 2008 9:43 :: Piggy :: Replies: 0 :: Views: 162

antenna effect of microstrip


n pcb, at certain frequency the s11 gets lower sharply, but s21 does not increase at that frequency, so i guess whether the power is radiated at that frequency and the microstrip structure acts as an antenna, could some experienced person give me so...
RF, Microwave, Antennas and Optics :: 25 Jul 2008 4:32 :: Kohi_boy :: Replies: 4 :: Views: 192

reg: patch antenna simulation in hfss


ive simulated gps patch antenna in ie3d and its return loss is around -15db and i,ve simulated the same antenna in hfss its giving return loss as -5.3dbattached here is my design in hfss.kindly check where ive commited mistake.im new to hfsshow can w...
Electromagnetic Design and Simulation :: 22 Jul 2008 9:42 :: johnson.mike :: Replies: 5 :: Views: 369

bluetooth antenna 50 ohm trace


hi,does anyone have any pdfs for designing an antenna trace for a bluetooth module? the module does not have an onboard antenna, so i will be needed a 50 ohm trace to a sma connector.thanks...
PCB Routing & Schematic Layout software & Simulation :: 16 Jul 2008 10:22 :: smith_suez :: Replies: 2 :: Views: 324

eliminating the cable influence in antenna measurement


hello,i want to measure the input impedance of an electrical small monopole on a 433 mhz transmitter pcb board. cause the system has no clear symmetry plane, its difficult to place the cable without affecting or possibly completely changing the imped...
RF, Microwave, Antennas and Optics :: 14 Jul 2008 23:12 :: Azulykit :: Replies: 21 :: Views: 1776

can hfss sim in lf(125khz) range?


1.does anyone using hfss do the lf(125khz) band antenna simulation?somebody told me should use maxwell to do the simulation?!2.and if i want to simulate antenna structure, how do i set the port?i using waveport setting and excite from sma sturcture, ...
Electromagnetic Design and Simulation :: 30 Jun 2008 8:52 :: jamesnick :: Replies: 0 :: Views: 153

gps impedance matching


hello all,i have a gps module and im going to place it on a test board which contains this gps module,matching circuit(to be finalised) and antenna.can anybody suggest me how to proceed on this for finding out the matching component values? also how ...
RF, Microwave, Antennas and Optics :: 27 Jun 2008 21:33 :: RF-OM :: Replies: 15 :: Views: 636

pifa design


hi,i have simulated a pifa for 900 and 1800 mhz gsm bands. the simulation has been carried out in agilent ads2005a. i want to widen the bandwidth. can anyone, who has some knowledge of pifas and ads, have a look on the project files (*.zip) attached ...
Electromagnetic Design and Simulation :: 01 May 2008 12:43 :: SagSag :: Replies: 15 :: Views: 1152

how do i mdel a waveguide in hfss?


hello.perhaps someone could help me, at least guide me into which tutorial to look at.. :/i have designed a small patch antenna, with a resonance frequency of approximately 6.5ghz. i cannot change its dimensions, since this is the largest antenna i a...
Electromagnetic Design and Simulation :: 07 Apr 2008 19:11 :: PanosB_GR :: Replies: 1 :: Views: 210

microstrip antenna design problem..plzzzzzzz


im designing dual resonance microstrip patch antenna.im using hfss.im using stacked method.im using foam as my substarte for upper layer(height is 60mm),for bottom layer im using air as substrate(height 15.2mm).my problem is the height for foam is la...
RF, Microwave, Antennas and Optics :: 04 Apr 2008 23:47 :: Ivan_ :: Replies: 32 :: Views: 1269

need help my design before fabricate


hai everybody.. thanks for ur time to read my post... =di already design my folded patch antenna using hfss v10. my design antenna dimension is 15mm x 15mm for ultra wide band (uwb) application. my bandwidth is 81.8%. my problem is i need someone who...
Electromagnetic Design and Simulation :: 04 Apr 2008 23:42 :: Ivan_ :: Replies: 21 :: Views: 962

meander line using cst simulation


t the waveguide port too short and waveguide must homogenousat least 3mesh planes along propagationi already change the mesh but still have problemso actually how we can define the port for each type antenna in my casethe meander line use dual sl......
Electromagnetic Design and Simulation :: 20 Feb 2008 7:12 :: kyg :: Replies: 13 :: Views: 770

effect of sma in hfss simulation


hey,i am interested to know what effect will adding a sma plug into the simulation do. will it make a hugh difference or not. we simulated a antenna with hfss but when we did the anachoic chamber test the results were off a little and the s11 was als...
RF, Microwave, Antennas and Optics :: 01 Feb 2008 4:21 :: daniels_here :: Replies: 0 :: Views: 138

sma edge board connector model in hfss or cst


can any one have sma edge board connector model in cst or hfss. or the meterial parameter and dimension of the sma edge board connector?thank you. added after 5 hours 22 minutes: and how to draw a bonding wire in hfss, not using the provided tool in ...
Electromagnetic Design and Simulation :: 31 Jan 2008 14:17 :: fantomf4 :: Replies: 4 :: Views: 562

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question about wave guide


dear all,can someone explain about the diference betwen cylinder wave guide and rectangular wave guide , when both are implemented or simulated. i mean the advantage and disadvantage.thanks in advance...
RF, Microwave, Antennas and Optics :: 30 Jan 2008 23:49 :: Azulykit :: Replies: 3 :: Views: 172

how to measure size of coaxial feed


hi..i need some help in solving this problem. ive design microstrip antenna with narrow slot. the problem is i dont know how to do the coaxial feed as feeding for the antenna. what size of radius that i should used? in the sct example, it used 4.0mm ...
RF, Microwave, Antennas and Optics :: 21 Jan 2008 3:37 :: ardique :: Replies: 0 :: Views: 96

active antenna


hi, everyone. right now there are some active antenna in the market, such as the gps antenna with lna built in, and with the gain more than 25 db. i am wondering if there is any references or information about this type of antenna. and how is the dc ...
RF, Microwave, Antennas and Optics :: 02 Nov 2007 6:16 :: Abhishekabs :: Replies: 2 :: Views: 180

how to increase beamwidth of vivaldi antenna


i am designing an antipodal vivaldi antenna in c- and x-band. i want to get a beamwidth of 120 deg throughout the band. but i am not able to do so. when i achieve the beamwidth symmetry of the pattern goescan anybody help me asap..itssssssssssss urge...
RF, Microwave, Antennas and Optics :: 07 Sep 2007 4:29 :: DrunkBear :: Replies: 17 :: Views: 525

discussion about setup for antenna rl and gain measurement


hi guys,im searching for someone that can once and for all give me the right way to measure antenna rl and gain. now...im not interested in the method...i know it but the correct setup. i mean..when i want to measure rl of a small antenna, take as an...
RF, Microwave, Antennas and Optics :: 31 Aug 2007 15:44 :: jallem :: Replies: 3 :: Views: 297

about empire


i heard about empire recently, who can tell me its difference with hfss or cst.and which one is good at antenna simulation? thanks a lot!...
Electromagnetic Design and Simulation :: 27 Jul 2007 7:05 :: krishna410 :: Replies: 6 :: Views: 480

how simulates probe sma connector in ads?


dear all,i would like to design patch antenna with sma connector from the ground plane.how can we simulate the sma connector using momentum?btw. it is could be understood using hfss or cst.thanks in advance...
RF, Microwave, Antennas and Optics :: 18 Jul 2007 8:32 :: Manjunatha_hv :: Replies: 6 :: Views: 948

pic + rf modules


hi everyone,project im currently doing involves pic microcontroller and rf transmitters and receivers. i guess some of you already have some experience with this staff. distance beetwen receiver and transmitter will be approximately 40 meters. im no...
Microcontrollers :: 20 Jun 2007 15:34 :: CMOS :: Replies: 6 :: Views: 957

rf test cable


hi, everyone. i have a question about the rf test cable. i am going to make a prototype of an antenna. the test device is the network analyzer with sma connector. i am wondering what type (model) of the rf test cable i can use. the prefer cable shoul...
RF, Microwave, Antennas and Optics :: 11 Apr 2007 22:18 :: jayleung :: Replies: 11 :: Views: 339

feed dipole antenna on surface


hi all, i met a question when i want to test a dipole antenna. i print the dipole on glass, but i dont want to drill a hole through it. so i want to feed the dipole on top of the glass. can anyone give some advice on it? for example, what structur...
Electromagnetic Design and Simulation :: 05 Apr 2007 21:40 :: adel_48 :: Replies: 3 :: Views: 138

patch antenna with probe feeding


hi all, i am designing a patch antenna with probe feed from the bottom of the patch. because it is my first time to do it, i have some questions: 1. i am not quite sure what kind of connector and lauch pin i should use. 2. i also want to know if i ne...
Electromagnetic Design and Simulation :: 16 Mar 2007 8:04 :: parris :: Replies: 2 :: Views: 246

s-parameter


i am measuring a cable with one end is open....i need to find out the loss of this cable. how can i do that ?...
RF, Microwave, Antennas and Optics :: 11 Mar 2007 16:49 :: heviraf :: Replies: 6 :: Views: 252

sma connector


hi,i have a rg58 cable. i want to make one end a sma connector. i have bought the sma connector accessories. how do i get the connector in? thanks...
Hobby Circuits and Small Projects Problems :: 31 Jan 2007 0:48 :: fiberdriver :: Replies: 2 :: Views: 202

uwb antenn and sma connecter


hi all:how to select a sma connector for a cpw uwb antenna? does the choice of sma connector changes the measure results (s11) significantly....
Electromagnetic Design and Simulation :: 25 Jan 2007 4:14 :: DrunkBear :: Replies: 2 :: Views: 192

cheap gps modules sourses?


hai please link me a low cost gps module which i have interface to pic.preferabily in india. is there any specification i should look for when selectinbg the module in order to fesilitate the easy interface to a mcu.thanks a lot.picstudent...
Microcontrollers :: 13 Oct 2006 6:40 :: asnodoc :: Replies: 10 :: Views: 1005

antenna source in germany


hello,can any one suggest me some good source for high gain 868mhz antennas in germany.thanks in advance...
RF, Microwave, Antennas and Optics :: 17 Sep 2006 5:24 :: brumi :: Replies: 6 :: Views: 324

how to measure s11 of a pcb antenna at 2.4ghz


the network analyzer to be as minimum as possible or at least below -20db at the specific freq: 2.4ghz, and i am using a 59 inch long rg400 coax cable. however the rezonance is shifting if i move the antenna far or near from net anal. i assume i am m...
RF, Microwave, Antennas and Optics :: 10 Aug 2006 14:46 :: Element_115 :: Replies: 9 :: Views: 477

anyone knows how to design a monopole antenna? help!!


hi,im fresh in designing monopole antenna for my project. however, ive heard that hfss allows me to simulate the antenna radiation and conditions. can anyone briefly provide me with any tips or steps? thank you!...
RF, Microwave, Antennas and Optics :: 28 Jul 2006 10:12 :: geppei :: Replies: 9 :: Views: 477

phased array antennas in hfss


hello. i have designed a conformal antenna for my theses. i am feeding it with coaxial cable. [actually an sma]. the exciatation right now is a wave port. i have to place more antennas around the body [biomedical application] and these must have pha...
Electromagnetic Design and Simulation :: 24 Jul 2006 17:05 :: Athina :: Replies: 0 :: Views: 246

nrf24e1 output impedence matchment quetion


w we have a problem of the impedance matching at the rf output port of ant1 (pin 19) and ant2 (pin20).i wonder how to design the impedance match circuits (l1, c11, c12, c13) form ant1 and ant2 to the antenna. for the datasheet of nrf24e1 does not hav...
RF, Microwave, Antennas and Optics :: 18 Jul 2006 19:15 :: mikal :: Replies: 13 :: Views: 564

how to design a microstrip matching network for antenna?????


i am working on a collinear printed antenna. the input impedance is about 80+j10. i need to design a matching network to lower the vswr. but how to design it. can you give me some examples or references?...
RF, Microwave, Antennas and Optics :: 30 Jun 2006 10:47 :: Demonis :: Replies: 13 :: Views: 732


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