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uwb antenna discussion

i know some uwb antennas such as cone antenna , horn antenna, and vivaldi antenna . who know some other uwb antennas , lets discuss it toghether...
Electromagnetic Design and Simulation :: 16 Sep 2009 6:40 :: panda.asit :: Replies: 33 :: Views: 6168

[need help] rectangular microstrip antenna

can any1 pls help me figure out what is my problem?? ive design a 886mhz rect. microstrip antenna and stimulate by using microwave cst!w(patch)= 10.52cml(patch)=8.4cmh=1.6mmw(feedline)=3mml(feedline)=4.75cmsubstrate=(20cm*17.8cm)relative permitivity=...
RF, Microwave, Antennas and Optics :: 31 Jul 2009 13:42 :: mauloftin :: Replies: 5 :: Views: 279

help in cst....defining cpw ports

y range.i have drawn the structure but im finding it difficult to define ports. can anyone tell me how to define ports for a cpw antenna.....width of the feedline=3mm and spacing=0.3mmim enclosing my cst files here in...
RF, Microwave, Antennas and Optics :: 14 Apr 2009 8:11 :: mauloftin :: Replies: 1 :: Views: 285

antenna patch. how can i made the feed network for array?

ive just simulated and realized a patch antenna single element with cst. (i used: patch, transformer lambda/4, feedline 50ohm)now i would generate an array of patch for 2.4ghz. how can i made the feed network for array?...
Electromagnetic Design and Simulation :: 23 Feb 2009 18:56 :: primaguardia :: Replies: 2 :: Views: 327

how to improve efficiency of patch antenna

i have met a puzzled problem. i use pin to reduce the size of patch antenna, but efficiency reduce sharply, meanwhile s11 reaches to -30 db, the max gain is about -5 dbi. what is the matter? help !thanks in advance....
RF, Microwave, Antennas and Optics :: 11 Feb 2009 23:51 :: myebook :: Replies: 20 :: Views: 2151

antenna design calculation software

can anyone tell me where to download the software that can be used for calculating the dimension of l,w for designing an antenna..thanx.....
Software Requests :: 11 Mar 2007 16:23 :: aly_chere :: Replies: 8 :: Views: 1059

proximity-coupled patch antenna with slotted ground in cst

hi,i got a problem recently as below:how to simulate a proximity-coupled microstrip patch antenna with a slot in the ground? i have compared the results simulated by ie3d, designer and cst , but only the result (vswr) of designer is a little similar ...
Electromagnetic Design and Simulation :: 17 Jan 2007 15:55 :: rinox :: Replies: 1 :: Views: 273

cst-feed line structure_port and boundary size

hi , friends!i am studying the structure feeding by a microtrip line on a vertical ground plane!i dont know i should use the large port size (full plane in waveguide port definition) or just use small port size for feeding?besides, boundary condition...
Electromagnetic Design and Simulation :: 06 Jan 2007 12:22 :: KhangKhang :: Replies: 3 :: Views: 300

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cst:how to check the input impedance of antenna?

i noticed another similar problem on impedance is discussed these days.as we know the input impedance is an extremely important parameter to antenna design.but can we check this parameter directly in cst?in 2d result, there are two items called wave ...
Electromagnetic Design and Simulation :: 05 Jan 2007 4:05 :: DrunkBear :: Replies: 6 :: Views: 987

cst:impedance of ms antenna

hii want to know how can i measure the impedance of a microstrip antenna.the problem is :with a microstrip line if i feed the antenna i dont know its input impedance. and for the feed line i will need to design it for a certain impedance. now there w...
Electromagnetic Design and Simulation :: 13 Nov 2005 7:57 :: Pushhead :: Replies: 3 :: Views: 333

wave port in hfss or cst

hi,i am trying to model a coaxial fed antenna using my own code but i dont know how the feed is modeled in hfss or cst. does any body have any idea how the feed is modeled in the case of waveport.thanks in advance,bradel_48...
Electromagnetic Design and Simulation :: 13 Apr 2005 0:17 :: adel_48 :: Replies: 2 :: Views: 342

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