bandpass filter design using planar couple lines in ADS

hello all..
i have project a tittle "design bandpass filter design using planar couple lines" by using ADS software in 9GHz center frequency...but i still blur how to start design my project..can anyone help me....

hi....this is div patel....
in dsbsc modulation the bandpass filter is followed by balanced modulator.....to remove unwanted signals......

In ADS u have design guide template for BP ...
u can use that..

First of all, u need to know the specs of the filter.. insertion loss, return loss, rejection, cut off frequency, pass band ripple, BW..

ya....dude....i know...

can you explain more about insertion loss, return loss, rejection, cut off frequency, pass band ripple, BW?...can you give me some reference to guide me..

hi
before start read this book
HF Filter Design and Computer Simulation by Randall W. Rhea

tq for the reference...:)

this is my specification for my project....
Center Frequency, ωc 9 GHz
Upper Cut-off frequency 9.5 GHz
Lower Cut-off frequency 8.5 G Hz
Bandwidth 1 GHz
Insertion loss <30 dB
Chebyshev prototype 0.5 dB
Input and output port inpedance 50 ohm
Chebyshev Approximation

Before i find the order N for filter coefficients of Chebyshev filter, there are a few calculations are related, below is the related formulas are:
Bandpass transformation
ω= 1/∆ (ω_F/ω_o - ω_0/ω_F )
Normalized frequency
|ω|- 1=x
After know the order of N, we can refer to the table chebyshev filter with 0.5 dB ripple for N=1 to 10.
after calculation i get the order N is 10 for Fc 9Ghz..
did i'm do the right way to find the value of my design?...
someone please help...

hi
i attach an ADS tutorial for filter

i have try the design using ADS...this is the result...

the result for the graph is not the bandpass..how i want get the bandpass graph?...

1. I guess 5 sections maybe OK, if stop band is not OK, then increase sections. What is your stop band spec?
2. Between two line, there should be "step"
3. Set goals, let computer do it.
4. Consider errors, if your goal is 8.5~9.5GHz, then you should set say "8.4~9.6GHz".

at first i have set the start at 8.5GHz, stop at 9.5GHz and the step size is 0.1MHz...but the wave is look like at the above..
then i try change the the freq..start at 8.4GHz, stop at 9.6GHz and step size 0.1MHz...the result as below...

how i want get the real bandpass graph..did i make a mistake..i have follow the ADS tutorial step to design it....

set variables and goals for optimizing

The best thing would be use the template in the design guide (passive circuit control window)... in the schematic use DG-bandpass filter and then use ur passive circuit control window to control ur design... also u can set ur goals and optimize it accordingly..

Thanks
Venu

can u explain about DG-bandpass filter?..i don't understand...

申明：网友回复良莠不齐，仅供参考。如需专业帮助，请学习易迪拓培训专家讲授的ADS视频培训课程。