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Thank you very much!

Hello, I am analysing Planar Inverted-F Antenna (PIFA) which is a kind of microstrip antenna, and looking for how its radiation patterns relate to its structure. For example, its E(phi) radiation in XY plane is like a circle-based shape, but how this relates to its structure...

Hello, I just do not understand an expression about VSWR. It is about something is defined as 1:2.5 VSWR.....I dont know what do it mean. Is that means VSWR=2.5 ??? or other meaning? Pls help! Raymond

Hi guys, I want to verify that, for XY plane, theta is 90; but for XZ plane , is it phi =0?? As phi starts from x-axis, for XZ plane is it phi =0, theta =0-360 ? for YZ plane, is it phi=90, theta=0-360 ? Please correct me if i am wrong?

Hi all, I design dual-band microstrip antenna using the formula of Freq=light speed / 4( length+width) for both lower and higher operating freq. There is a U-shaped slot on the radiating element........ However, it seems that the higher freq one always has a narrower...

Hi all, I recently designed a Plane inverted F antena (PIFA) for Dual-band microstrip antenna for 900MHZ and 2GHz, however, when i do the adjustment, it is difficult that both frequencies dB are very low, nearly 8-9dB.........so is that any other way to solve this??? Ragerds, Raymond

Hi all friends, I recently study the microstrip antenna, however, I have some problem, that is I really dont know the criteria for measuring its bandwidth. Its formula for measurement: voltage standing wave ratio(vswr) < 2 Bandwidth = {(S-1) / Qx (S power1/2)} x100% Q= center freq...

Hi VE1BLL, Thank you for your help. In fact, I have gone that site before, but it is really a very fundamental study guide. May be is there any site can provide some XFDTD design examples for download? Such that I can know more from it. If you know, Pls kindly tell me. Thank you very much

Hi, I recently need to use a software of XFDTD v.5 to simulate the performance of the designed microstrip antenna. However, I am so poor that i do not know how to use that software. I have accessed the website (remcom.com), however, that site only tells me the general and brief view of...

Hi, Please kindly help me!!! One of my projects now is to design a microstrip antenna for 3G mobile......which i think need to be designed based on 3G requirements (such as operating freq, large bandwidth...etc). Would you tell me where I can get some reference design on it??? Thx a lot...

Hi, How are you all. I have a project to design a microstrip antenna for cellular phone, which is based on simulation the design models using a program called Finite-difference time Domain (XFTTD).......So far, I really want to consult some example and analysis of the design, but I really...