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dgs filter
I want to use the @DS to design a DGS filter , but i donot know how to draw the architecture in layout , especially the part needed to emit in Ground.
Anyone who knows about it ,please help me . Thank you very much.
need Duplexer articles
mogwai: I'd better like to need some other detailed data besides the data the company provide. I appreciated if you help me. Thanks very much!
need Duplexer articles
does anyone have some articles about "WSD-00327 UMTS Duplexer" . i need it for my degree paper. I appreciate if anyone can give help me . many thanks!
Re: how to design microstrip filter with high stopband rejec
hi all: i try to introduce transmission zeros near the passband to achieve high rejection. but the TZs is so close to the passband , the passband insert loss becomes very bad.
in addition, for resonator, are there any available...
Re: how to design microstrip filter with high stopband rejec
I design the suspended microstrip filter in order to get higher Q and try to introduce cross coupling to improve outband rejection.
flatulent : you mean design the active filter? i am a fresh man in this, can you give more advice...
I want to design microstrip bandpass filter at 2GHz, the bandwith is 60MHz, but at the 130MHZ, it require -80dB rejection. I know if waveguide filter maybe meet the requirement, but I don't know whether the microstrip can reach it. anyone have experience can give me some advice
Thanks !
I try to design lumped bandpass filter with coupling coefficient and quality factor method. but i have been in trouble as follow :"
6ord_cross coup (F:/project1/bpf_f01.95/)
Export_Filter1_0
[error] Optimization failed - OptimizationSetup1.
[error] Optimization variable...
I make the series L to parallel LC in order to produce the transmission zeros near the cutoff frequence because the filter require very high out-band attenuation.
thanks :), now i am designing a lowpass filter with suspended material. I first designed the LC lumped lowpass filter. then i realized these L,C component in distributed structures . for example : shunt C is realized in patch , but the series C (the value is about 6pF) isn't easy to realized ...
thanks, i was asked not to design the capicatance with multilayers. now i have no good ideas sbout the parallel capacitances. anyone can help me? fc=2GHz, and the wavelength is about 124mm, and the value of the parallel capacitance is required about 6pF(so big value ,isn't it ?).
Hi all;
i am designing a low-pass filter, i found when estimating the capacitance of the planar intergital structue,capcaitance has great deal with the frequency.anyone can tell me how to reduce frequency effect and keep the capacitance a steady value in 1.9GHz¬2.2GHz ? Thanks in advance.
Interdigital filter
you can extracte parameter Q, K from the length of rod. As you choose the Q and K method to design filter, u know the Q and k of the ideal lumped filter.then you can adjust the length of rod until you get the Q and K that you wished.
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