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178 Threads found on Mixer Lna
I have a question on the effect of IM2 vs IM3 in I or Q-channel individually, versus at complex baseband: In a quadrature downconverter, assume each path (I or Q) contains an lna and mixer which contribute IP3 or IP2. The IM3 from the lna is at the input to the mixers, so the IM3 along with the signal undergo complex (...)
A balanced diode mixer is the usual solution to modulate a RF input signal with +/- 1. Or a balanced active modulator. "Modulating lna" sounds counter-intuitive, because an amplifier is expected to have a defined gain sign, either positive or negative which doesn't depend on the power supply.
RF(2.4Ghz) converted to IF (70Mhz) by lna, mixer and bandpass fiter and then go to ADC. Those are the common block for either Bluetooth and 802.11 right? The difference is how to process the packet (which is done by DSP or software) right? So, the hardware transceiver the same for both ?
Hi Guys! I am having problem figuring out a circuit (Attached in the message). I can identify the components individually but I cannot figure out what is the purpose of this circuit or where is it used. It looks like an fm transmitter/receiver/lna/mixer circuit, but I am not sure. Any suggestion would be of great help. Thank you in advance!
I'm trying to design a Bluetooth module from scratch. I have experience designing RF (< 1GHz) transceivers from scratch but not ISM. I do discrete design and not IC so planning to use IC for mixer and ADC. I will be designing PA, lna, Antenna, VCO, loop filter, PLL and etc. need some advice on where to start. Any references or any advice? What
I have designed the lna on ADS and practically implemented it too on Roger 5880 at 5.5GHz...I want to design a mixer that follows this amplifier using ADS.Can anybody guide me?
you do not tell us how long the interconnecting transmission line is, nor how much amplitude ripple you can live with over a bandwidth. If they are really close, just hook one to the other. If they are far apart, you could add a series resistor at the mixer, and run 75 ohm line. if it is narrowband, you could just run 50 ohm line from the
Hi, For one of my project work, I want to simulate a simple circuit of an lna and an IQ mixer used in down conversion mode. I downloaded and installed vendor component directory but they have not given direct modules for this specific IC in ADS. So I used data-item and s-parameter file for lna and mixer2 model for (...)
Hello, I am new in this field and i am designing gilbert cell mixer but i don't know how to do the input and output matching. Can anyone help me with this ????
I've been simulating a mixer+lna using PNOISE in spectre, and I can't make sense of how F and NF are being calculated from the simulated input referred noise. Below is an example result, input noise and NF are at the
high i m designing RF mixer for Wi-max application how to measure power dissipation and N.F. of mixer in cadence.
You cannot use s-parameters in mixer ( or general speaking, nonlinear ) simulations.You should find a proper nonlinear model.
Hello everyone I have lna mixer ıf amplifier and ıf filter on the pcb and I want to measure signal power,return loss, inertion loss on the pcb what is the best solution for this. Should I put directional coupler every spot or any other method to measure signal Thanks in advance
Hi all, Does anybody here know some tools to draw transceivers block diagrams (Antenna, filter, lna, mixer, etc...) and with which we can export diagrams in .eps format. Thanks in advance, KRAHASS
Dear All, For RF receivers with I/Q channel, lna-->I/Q mixer-->I/Q LPF-->IQ ADC digital assisted dc offset cancellation(measure ADC output DC offset-->adjust current steering DAC whose output is LPF input, binary search untill ADC +/- output are close) Now, the question is, I/Q path DC offset are NOT the same, which mean 2 DC offset cancella
NEC68830 is used for 1-2GHz VCOs in many papers and App.Notes.But the same transistor is also used for lna or mixer. So, it's hard to say there is a such list.Every transistor-of course except some extras- can almost be used for all purpose with diffeent design techniques.
Maybe there is something on the net that i did not found yet? First, the task is given. For example, build some oscillator or lna, or mixer, then S parameters are given and target frequency or band. I want to see at least some answers in numbers, microstrip lengths, so i can calculate them by myself and do some self-checking. Maybe it is a book.
Hi there, Ive built a lna + mixer + Lo direct down-conversion receiver. flo = frf = 5.2G. However I met lots of trouble when trying to get IP3 and Noise Figure of total circuit. Cadence cannot perform pss simulation due to non-convergence. At first it's because we have both driving source and autonomous in one circuit. So I add a small sourc
Since S12 is different than zero, input impedance of any kind of system/amplifier/mixer etc. will be depended on load impedance.
Hello,I have designed a simple sinlge-output lna and I would like to connect to a current-driven single-balanced passive mixer. Considering the I path only what defines the value of the coupling capacitance?Is there a formula ? I would like to add that the mixer is 50% duty cycle. Thank you in advance!
Input Noise=4KTB, i.e.-128dBm So input SNR=Pr/(Input Noise), i.e. 20dB. Then system NF=Input_SNR/Output_SNR, i.e. 5dB from system NF, you can easily find the Gain of lna. the result is Gain=9dB. Obviously your picture is lack of mixer and IF filter and IF amplifier. If add these components, the lna gain should be 12dB. And the system (...)
I have layouted an lna and mixer . there is an error in LVS says the ntap is connected to gnd! and the error marker refers to the nwell of caps. I connect the bulk or pwell of transistors and caps to gnd . for the sake of this error i connect the nwell of caps and transistors to the vdd. for the transistors there is no difference between connecting
I have designed a front-end and now i want to layout it in cadence and post layout it using assura. but there is some problems in extracting extracted file at both of the lna and mixer , all of transistors have the width fixed to 15u , capacitors to 30fF, all kind of resistors to 5.62k and inductors to a few hundred pH. I manupulated the extrac
Sell MMIC components from major microwave components manufacturer for E-band 71-76/81-86 GHz for Tx/Rx chain design: Power amps (3 qty), lna (1 qty), double-balanced mixer (1 qty), IQ mixer (1qty), x3 and x2 multipliers (1 qty)... Items are new and still in their original box. First were intended for an aborted research project. (...)
Because is radiated, and perhaps lose a lot of power, might need to put an amplifier before LO input of the mixer.
Dear all, I work for a RF receiver system design now. I need define RF down-conversion mixer parameter and circuit that mixer following lna. One of RF mixer circuit performance is Gain=3dB ,IIP3=9dBm OIP3=12dBm; another circuits RF mixer performance is Gain=10dB ,IIP3=2dBm OIP3=12dBm.From reduce the (...)
Hi all, I want to design a single ended to differential signal converter balun which is to be used in cascading lna & mixer. i tried in asitic but the parameters extracted are not correct. I am new to HFSS Do anyone have a tutorial of balun simulation in HFSS. please post the link or any ideas will help. Thank You.
hi all, i want to design a balun using ASITIC software that will take single ended i/p from lna & give differential output to the mixer stage. the main problem is the equivalent model of balun & the parasitic extraction analysis of balun in asitic?????????????????? i want the balun to work in 2.4 GHz range for ZIGBEE SYSTEMS.
First question should be : What is the purpose ?? lna, PA, mixer, OSC or General Purpose.. ???
Does any body know how to measure the lc tank quality factor with software(rf spectre .i.e cadence) and by calculations too? is it possible to get 900 ohm impedance of an lc tank ?(this lc tank was used for an lna load.)( l=5.49nH , c=651fF).the lna has a dc blocking cap of 2pF value after the tank. what is the relation between the impedance, l
But in Cadence, there seems no blocks which can generate Gaussian pulses,There is no tool which name is Cadence. Use correct terminologies. See "$CDS_INST_DIR/tools/dfII/samples/artist/rfLib" provided in Cadence DFII. You can see examples of lna and mixer, etc. which implement IIP3 and
Hey guys, I have a project where I need to design the system for cognitive radio ( transmitter and receiver) and also build 2 components ( lna and mixer) as a part of my RFIC design. I was looking for papers and materials but if someone is currently working in the field and can give me some numbers abt the power, Noise figure, IIP3 and other
I want to know how to design and simulate an rf system (transceiver) especially lna and mixer with matlab toolboxes.I need a full tutorial about it. you know we are going to design a full zigbee system with matlab and we don't know how to do it? tankyou for all beforehand.
I'm an electronics and communication engineering student at my last year asked to do a graduation project we're asked to make a spreadsheet for the cascaded blocks of the CMOS RF Receiver(lna , mixer , Filter .....etc ) what i need help in, is: 1) What is the spreadsheet ? what is it used for ? and why we need it ? 2) It's asked to be in EXCEL fo
Hi! Can you give more in information about the project? 1)What process are you using? 2)Specifications for the lna and mixer? 3)The termination for the lna it will be a non 50 Ohm load (Input Impedance of the mixer) or a 50 Ohm load? Best regards Canosa
i'm designing microwave transmitter using ADS consist of lna, mixer and filter...IF = 233 MHz, LO = 37.767 GHz, RF = 38 GHz.. when i simulate to get Nf vs Freq result, it shows constant 0 dB ranging from 0 to 40 plz someone tell me, wheter my simulation result is correct? if not, what modification or changes should i do...?
Hi - I have following structure: Differential lna, feeding both, differential mixer I and differential mixer Q, mixing the RF input frequency with LO down to DC. Thus getting OutIP, OutIN, OutQP, OutQN. Before I want to add I and Q, they should be squared. Speaking: mixing the OutIP, OutIN with OutIP and OutIN (same true for Q) and (...)
No relationship. mixer LO power is a function of the mixer design. If it is totally pasive mixer, the LO power will be a function of desired signal handling capability. a side, lna gain of 50 db is very high. If you are able to keep it stable you will likely have other issue with larger nearby frequency signals (...)
I'm looking for a ADS tutorial to simulate any RF sub element such as (lna, power amp, antenna, mixer with transistor/diode models given in the ADS). Thank you guys in advance.
Hello I am currently working on current mode RF receiver front-end question is do I need to conjugate match between two blocks(eg lna - mixer) normally for current mode, input impedance should be very small and output very large. Do I need interstage match??(Rout=Rin)? antenna(50ohm) - (50ohm)lna( ?ohm ) - (??ohm)
Hello I designed a lna - passive mixer driven by a VCO. I used a simple NMOS switch as passive mixer. the lna output is 900 MHz, has an amplitude of 5 mV. The gate of the passive mixer is driven by VCO signal at 901MHz, with rail-to-rail amplitude. Now, the output (IF signal) is a 1 MHz signal (...)
You can't change directly because its lna and mixer ( and apparently PLL )have been optimized for this frequency.But you may use a external mixer-oscillator to downconvert this this case you should use an lna that will operate at 900MHz.
The input referred noise of the system will divide the NF of the mixer by the gain of the lna. Did you optimize the NF on the mixer transconductor? The chopping mosfets produce noise during the non-zero power switching transitions. Maybe it is switching too slowly.
I design a Receiver as below with MiNi's Product . >> >> filter---AMP----MCA1-24---MAR-6--filter--amp2-- >> >> nowthe receiver NF tested is 14dB. >> >> But the first filter and AMP 's Gain and NF tested is 14.8dB and 9dB >> >> the MAR-6\ filter and amp2's Gain and NF tested is 28dB and 2.8dB >> >> but why the NF is worsened to 14dB
hi~I use calibre PEX to generate the layout RC extraction file,than I simulation these files by ADS.....I was simulation a lna and mixer successful in this way....but the VCO is not working:cry:
hello; as iame a new user for dolphin smash 5.13; i want any help for using it ;for example if anyone give me any exlication for file.path haw can i use it and have anyone a complete code vhdl_ams for any compsant such as lna or PA or mixer or any radiofrequency blocs thanx for the help please help me because i am working my final study proje
Hi all, I am trying to measure Sparameters for a lna. In measurement, the lna output load is 50Ω. However, in real life, a mixer is connected after a lna. So the output load of a lna is not 50Ω. My question is that if I have a S-parameters under 50Ω load, can I convert them to a new set of (...)
Your circuit may oscillate around 6GHz and it can saturate your circuit even tough this frequency is out of band.. An lna should be uncondictionally stable over very large band otherwise after lna and mixer, some spurs will influence your design.
Hi dears... I'd like to design Low-noise down-converter and I know to design each stage like (lna, mixer or oscillator) but I don't know to start designing it. So I need your help to know in general the first steps of design and the simulation Low-noise down-converter. I think, its better to provide me some of examples of design. Thanks in Adva
Hi, I am working on a mixer and lna postlayout simulation. The layout includes the bonding pads and some decoupling capacitors. The total area is 1sqmm approx. I am using Hspice RF for the simulation and the commands HB to obtain the P1dB, IIP3, and NF. Hspice will run until the following message: hb residual = 5.656854e-001