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234 Threads found on Selective
Hi everyone, I am trying to do two-band antenna and use inductor as selective network for frequency separation. And how to specify the natural resonance of the inductor with interturn capacitance, when it similar to parallel oscillating loop? 137457 137458 Thanks in advance.
What is the physical significance of "channel tap" in a Raleigh fading channel ? Is it related to number of paths and how to determine the number of taps? As the single tap flat fading channel is implemented as Data_length=length(Data); %% Data is any signal ray = sqrt(0.5*((randn(1,Data_length)).^2+(randn(1,PAR.Data_length)).^2)); Dat
In frequency selective channels, there is intersymbol interference, and the received signal is written as y_k=\sum_{m=0}^{K-1}h_mx_{k-m}+w_k Channel taps are the number of resolvable paths (Search for resolvable paths).
Can you help me to design a Reconfigurable Frequency selective Reflector in is fed by the monopole antenna and the FSR plates are made up of copper.FSR acts as a reflector when the switch is ON and it acts as a transparent when the switch is OFF.For this i want some formulas like how to calculate impedence for the FSR and what should be the
Could you please let us know more about the Frequency selective Reflector? Is it FSS layers beneath a planar monopole antenna?
131634 please someone help me to design this images in HFSS
Hi all i desire to design frequency selective surfaces in CST, but i use the unit cell boundary conditions and frequency domain solver. The S parameter results are Szmin and Szmax, but really i cant know which are the RL. and which are TL. Can any one help me or explain Szmin, Szmax? Also can i simulate the FSS using time domain solver?
Since P types have higher RdsOn than N types for the same size, selective matching of turn on and off using a diode shunted gate resistors helps in tuning the symmetry. Show your requirements by values and results with required load impedance and voltage range. There is a wide range of applications for this and your question is vague.
Hello, I have found this little powermeter and I like it because it is passive and it has a logarithmic scale. I want to alter it to a "selective voltmeter" or "wave analyzer", for the HF radio amateur bands, so that I can monitor the different harmonics levels. I believe this can be done with
explain in c syntax I believe, betwixt did. Port B IOC feature doesn't distinguish between 0->1 and 1->0 change. If you want direction selective action, make respective logic combination of "old" and "new" port value. I have a problem with the method suggested in AN566. As far as I understand, the bit test operations performe
You may want to start by studying frequency selective surfaces. This will give you the basics on periodic structures and some of what can be done with flat structures. The most popular book is by Ben Munk. Here is a link to that book: I think after this, you will be a much be
Hi, How to make matlab program for doubly selective channel? I know by using Jake's model or Clrack's model but in this case the resulting channel in time domain represents as a matrix where its columns represent the length of transmitted signal and its rows represent the number of path. Is there any method to generate the channel impulse respon
can any one help me on ccprl and optimal selective huffmann coding?
120304 Please I need help from the programmers in the house. I am not a programmer myself but if a code is generated, I can dump it into PIC or AVR and place the device into my circuit. This is all I can do in this MCU of a thing. The diagram above is only pictorial representation of the Project. It does not necessarily
sir please send me the matlab code for selective tap used in echo cancellor
Instead of IC MAX7400 , maybe use RC active filter , or several RC active filter in various combinations . I am thinking about RC filter low-pass , high-pass filter , or other . If we use low-noise op-amp , they will be really selective I am learning English . If I am writing bad ,please correct me .. Man is learni
hi, i had designed three modules(using verilog) and make it together using a wraper. example module top() :::::::::::: ::::::::::: A uut(); B uut(); c uut(); endmodule after this, when i synthesis the top module , i need only MODULE A to get synthesized and not B and C. then next time only B not A and C is there any way
Full RC extraction using calibre making the netlist too large to run simulation. Is there any way to extract all C but selectively extract R for only a few critical nodes?
Hello, I am looking for a module that selects automatically between the main power supply (DC supplier), and the backup supply (battery) when my main source is off. I tried searching for mini power converters or BMS but didn't find what i needed. If i had more time I would design one myself, but I'm affraid i don't have the time needed (maybe
GSM repeaters based on diplexers and selective amplifiers can be made and are commercially available. But you need considerably deeper knowledge of RF engineering than applying an amplifier IC to make it.
If you are talking about PCB component side, regular PCB clearance and creepage rules for the respective operation voltage apply. Component metal cases have to be considered of course, obviously SMD components must not block throughole assembly. For the solder side, observe the restriction by the used solder method, e.g. selective wave solder.
The selective heating of highside transistors can be e.g. caused by - asymmetrical control waveform, particularly different deadtime or duty cycle - asymmetrical circuit layout, causing respective differences in circuit inductance - insufficient bus voltage bypassing Probing transistor voltages and currents should reveal how it's brought up.
You either need to connect a load, or go for electrical field (voltage) sensing. It's not as selective as current sensing.
Dears ; I am working on the following paper , "Performance Analysis of Wireless Systems With Doubly selective Rayleigh Fading" which in the attachment ; i need to prepare a report including simulations of the results . if any one can help i will appreciate that a lot . :) i need a matlab code of the paper > please , for urgent BR .
Hi, Anyone knows about how to check the angle variations in case of Frequency selective Surface using the wave-port in HFSS. Actually i want to verify the results of FSS unit cell using Floquet port and wave-port in HFSS. Please guide me how the task could be done. With Best Regards: Muhammad Idrees
Hi to all; I want to design conformal FSS. so in this regard i need to know which tool is best for conformal design either HFSS or CST:?: Actually i am use to with HFSS, if Conformal FSS could be designed in HFSS then Please share some tatorials with me. If Cst is best for conformal FSS then kindly guide me how to design?:?: :thinker::think
Dear all ; I am working on the attached paper which discuss "The Effect of a selective Receiver on CDMA" I need to write a report for this paper and I don't know how to start If any body can help me , i will appreciate that alot Please for urgent if needed this is my email : thanks in advanced
Hi, please provide me with tutorial on Ansys designer for designing free space passive frequency selective surface filters. thanks, Eng.SAM
Hi all, I am trying to implement STTC-OFDM (2Tx-1Rx) over frequency selective channels(2-taps or 3-taps and so on). I need a modification on my code over single tap quasistatic flat fading environment. My question is how can I use the channel impulse response for multiple tap channels on the maximum likelihood decoder to calculate branc metrics.
Hi to all, I am new to COMSOL Multiphysics. so, I want to know, how to simulate a periodic structure (Frequency selective Surface) in COMSOL Multiphysics ? Can i have some tatorials on how to simulate FSS in COMSOL Multiphysics? OR can anybody share simulation file for the purpose? best regards
Hello all... THis is my first post.... I am working on frequency selective surface in X band... I am easily getting RLC equivalent circuit of my FSS model for patch but in apertured FSS of the same dimensions, i am getting an equivalent circuit netlist from HFSS which does not include Capacitor.... Please help me out that why i am not
Hi every body I have a new good idea which is to make one 3D frequency selective surface active but i can not implement it due to complicated DC feed for the diode I would like to ask where do you think I could publish with out practical results in the IEEE ot IET or dose any body has this experience in publishing only simulation thanks for giv
There are many frequency selective circuits ( TLs,Caps etc) therefore your LNA is a narrowband one. What you were expecting ??
I wish to design a Hilbert Space Filling Curve frequency selective surface in IE3D but i do not have any idea how to make that structure in IE3D. Please help me...
Hello, I am simulating a Single Carrier system, using linear and non linear equalizers, to cope with ISI. The channel model I am using is '3gppTUx' in Matlab's stdchan parameters I use are: % Sampling
Hi to all; Guys my question is can we simulate frequency selective surface using Wave-port in HFSS ? Secondly Can any body share an HFSS file as an example for me that uses HFSS and wave-port for Simulation of Frequency selective Surface? With Best regards:
To get a -good- op amp you would have to be pretty selective about components and especially matching. The old timey module op amps did a lot of binning and trimming. You can find many op amp schematics in old National databooks; LM301, LM324, LM741 are about as simple as it gets. And nowhere near "best". A single stage op amp design may be ha
Hi My question is that can we simulate A Frequency selective surface using some other ports like waveports?? in HFSS OR we can only use floquet port for simulating the Frequency selective surface? If it is possible then tell me or share some tatorials with me.:wink: Best regards:
Hi to all; I am looking for the examples of frequency selective surfaces simulations using waveport in HFSS. can anyone help me. Best regards
So you must use an IR filter passing only the light from your IR source. In addition you should modulate YOUR IR light (a chopper) and use a selective amplifier after the photodetector, to avoid unwanted response.
Yes, you can extract all of RLCK of all interconnect wires, or selective nets, by using Cadence QRC extraction tool. Inductance extraction is usually required for for higher frequencies - I am aware of Analog Designers doing so from 2GHz - to -
Hi to all; My Question is what are the parameters that are enough for analyzing a Frequency selective surface using HFSS? Means i am designing an FSS for band-stop applications so what parameters should be helpful to me for analysis for the structure? Like Scattering parameters S11 and S21. What would be the other parameters other than Tr
The simplest qualitative explanation is that the elements appear to be of different size to a wave coming in at an angle. Different size elements will resonate at different frequencies. A more rigorous explanation depends on what type of frequency selective surface you are working with and what kind of physics it is employing to produce frequency
I am using CST Microwave Studio for Frequency selective Surface (FSS) design. In the unit cell simulation setup i can change only the incidence angle. The solver generates output only for TE and TM polarization. But how could i simulate for polarization angles other than 0 or 90 Degree. (Ex: I want the Tx,Rx response for polarization angle of
Hello Can anybody tell me that how to check angle variations in HFSS of Frequency selective Surface. For the parameters like S12 and S21.:idea:
hello am working on a project using frequency selective fading channel with 3-taps lets assume that the channel is like that H = there is this equation where i need to calculate |H|^2 so what does |H| represent ?? is it the normal of the H vector .. or is it the average ?? .. also the variance is a choice but i do
Yes, LC is the only part that select which station that is received. It would not be stable or selective if antenna, with frequency depending undefined and unstable impedance load would be a dominant part of the tuning circuit. Triode load is low and almost constant. It is possible that antenna is better matched but it depends on how antenna is des
Hello all Am simulating a circularly polarized frequency selective surface using HFSS Floquet port model In a unit cell configuration. In order to achieve circular polarization, i have defined port one wave one to 1W, 0 deg Phase, and port one wave two to 1W,90 deg phase. After running the model, how can i combine the scattering parameters S11
Hi All, I performed a BER analysis for a frequency selective fading using MATLAB inbuilt function rayleighchan. But I am not sure , whether my result is correct. Please reply. I am attaching the output plot here. Legends: x-axis : SNR in db y-axis: Probability of error.
Hello everyone, What are your thoughts about the impact of a CP antenna when having it illuminating on to a symmetric frequency selective surface? Will the antenna's CP quality be degraded by the FSS or not? Thanks very much. Posted via Topify using iPhone/iPad