Dear experts, As all know there are two kinds of Q, one is unloaded Q factor, which is defined as a ratio Q=(Stored Energy of a Resonator)/(dissipated energy...
Hello everyone, Calculating peak electrical fields in a waveguide filter is a relatively straight forward task using 3D simulators. From E-field cuts in the...
The loss tangent of Teflon material is usually given as 0.0001 for GHz frequencies. In a recent publication however, a distinction is made between 'normal...
In the example B. Complex equalization zeros. and in the table 2, at the step 7, the angle is 0.1946-0.5467i with the complex transimssion zero -0.29-0.124i. I...
I am out of the office until 09/15/2010. I am not available from 9/6-9/14. Please contact Tao Shen for IS-23 payload related questions. Note: This is an...
I am out of the office until 08/30/2010. I am on vacation 8/20-8/27. Please contact Tao Shen for IS-23 payload related questions. Note: This is an automated...
Dear Experts, I'm now studying the paper " Synthesis and design of novel in-line filters with one or two real transmission zeros" I'm following the example in...
Hello experts, Recently a number of multi-band filter papers are published in IEEE and other journals, but I wonder whether they will get real application in...
Dear Experts, I would like to do a circuit simulation for microwave filter with FIR(Frequency Invariant Reactance). but I'm wondering what is the equivalent...
Hello If it,s possible pls inform me about method of calculation of a radio receiver sensitivity that uses from CDMA as acces methods .for example in a GEO...
The parasitic suseptance due to a geometrical step from propagating guide to evanescent waveguide is given by equation (8) in Rick Snyder's paper entitled "New...
In design of a DFD , selection of "Number of correlator" and "desired freuency " depend to some factors. for example an DFD in frequency range(2-4 GHz), Do...
Dear all, I have designed a BLC in CST2009, but i cannot add 50 ohm-port to input and output ports. My file BlC is attached. Please, correct it and send it...
Dear Everyone, I'm now reading the paper : "Novel Approach to the synthesis of microwave diplexers" by Macchiarella. In the case of type 1, the degree of SRX...
To calculate the normalised external couplings from g values: q1 =g*g1 qN=gN*gN+1 (Usually q1 = qN) To calculate the internal couplings: ki,i+1, = 1/...
Hi everyone, I am having a small problem I can't quite pinpoint. I have a lowpass filter that when i measure the 2 harmonic, i measure a higher than expected...
Coupler is always needed in systems.I have read through the microwave bible about coupler design.and have the successful experiences in designing 2 section...
Hello Yu, I only did the simulation and changed to use waveguide structure because it has waveguide ports, and I did not do an experiment for it. As to 64MHz...
(The workshop registration is free) Title: International Workshop on Microwave Filters Start date: 16 November 2009 End date: - 18 November 2009 Organizer:...
Dear fellow coaxial friends Anyone knows where I can find the information regarding the followings equipment, reading the internet seems confusing at times, as...
Dear experts, Now I am puzzled with a filter problem. I want to design a varactor tunable bandpass filter which operates 100MHz-200MHz.The insert loss and...
Dear experts, Can anybody give some guidance to the design of narrow band notch filters(for example, the notch band is 2000+/-0.5MHz? I guess there need to...
Dear experts, I'm now studying for polynomial synthesis from the book Microwave filters for communication systems. At the page 312, in the table 8.3 I got...
Hi, I am wondering if someboby of you might recommend me reference (paper or book) about the fundamental definition of active scattering parameters for passive...
Dear sir, I tried to follow the paper, Novel Approch to the synthesis of microwave diplexers. I'v got same result for the Type 2 example case. But for the...
Is there commercial software available that can extract the coupling matrix from the s-parameter file derived from the HFSS filter model with lumped ports on...
Recently I was asked to comment on a narrow bandpass filter for high power at low VHF frequencies. A brief analysis revealed that the insertion loss would be...
Dear mtt-8 members, In the hope to clarify things about the delicate step of the synthesis of a coupling matrix when starting from a scattering matrix I have ...
