Search results for query: *

Hi everyone, I got a problem in understanding the physical concept of electromagnetic mode. Mathematically everything is straightforward, but physically what is the meaning of mode. I mean if you check the system end points there would be energy in input and energy in output so "what is mode?"...

Hi GOTWW, What are the boundary conditions for TEM mode propagation? For example, the field near an antenna can never be TEM but at the same time the field in the far field will be very close to TEM mode. Why this happens? Why we can't have TEM mode in microstip line but it would be much better...

Hi, Can any body tell me why we have TEM mode in a coaxial cable but we can't have it in microstrip transmition line. In another word I want to know what are the physical constraints for TEM mode propagation. Thanks in advance. Amir

Hi, There is a question in my mind that I can't find a good answer for it. I hope you can help me. Is there any relationship between the resonance frequency of an antenna and its radiation efficiency? I mean for example if we have a microstrip antenna not working at its resonance frequency, can...

Hi Everybody, Please help me to solve this problem. I have a loop and I want to show the indicator of the loop as a text in a location of my figure. For example, think that my loop is running from p=1:300. I want to be able to show the number corresponding to "p" in each iteration. I know that...

Hi All, Dose any one of you have any information about the calculation of axial ratio for examining the cicular polarization of antenna pattern. Thanks for your attention.

Hi MacGyverS2000, Thanks for your helpful hint. I was successful in allocating a one dimensional array with a very large size. The only problem I have now is to be able to allocate a 4 dimesional array. Would you please help me agian if you have any idea regarding this case. Thanks again.

Hi, I got a problem in VC++. I am trying to run the following program with VC++ but it terminates. The problem is with the size of array. If I change the arraydimension to 50 everything works prefectry but I need to work with large array size. If you have any information regarding this case...

Hi, Thanks for your replys. I need an overall view of BFN. I am not looking for a specific design or application. My main purpose is the information about the advantages and disadvantages of each kind and when we are going to use each one. Regards,

Hi All, Does anybody have any information about Beam-Forming Feed Networks used for phased array antenna? I will be very thankful if you help me. Ragards

Hi, I don't think that microwave office can be used effectivily for 3D structures. Microwave office is very powerful for layered planar structures like Patch Antenna. In your case you may better use NEC, HFSS or IE3D. You may find the following ling useful...

Hi All Dose anybody have any idea about microstrip phase shifters. Specifically, about there technology and design. Thanks in advance Mirok

Hi All, I am trying to prepare a survay on microstrip array anttena. I will be very thankfull if you can help me. Any information about books and websites on this category will be helpful. Regards,

Hi All, I need some information about MF/LF antenna. I will be glad if anybody can help me about this topic. Regards

Hi nbucska, Thanks for your attention. I need to desing a synthesizer for operating in to band 1.1-1.3 and 2.2-2.4. Q3236 is a PLL Ic which is designed by Qualcomm factrory. Its advantages is its having very low phase noise. http://www.qualcomm.com/press/pr/releases1996/press670.html I hope...

Hi, I want to be able to simulate its performance, and to be able to lock it with the desired frequency. Regards, Amir

Hi all, I need some information for simulating Q3236 PLL. Is there any available simulator for this IC? At the end I want to design a synthesizer. Thanks in advance for your attention.

Hi yan75, There is no need to test the antenna with 300W of input power. for testing I apply much less power:) Tanx for your attention

Hi, I have a problem in simulating an antenna structure with the aid of Microwave office software. I want to simulate the antenna structure together with all the active components such as a balun and the reciver. thanks in advance for your sugestions. Regars Amir

hi sowmya99336 I appriciate your idea. I myself think the same. The only problem is the maximum power . Do you know any subtrate to handle 300w of power. Regards