Low sensitivity symmetrical response microwave filters

The paper proposes a modification of the chained filtering function for low sensitivity symmetrical response microwave filters. The new filtering function uses generalized Chebyshev polynomials as a seed function. The proper return loss grouping leads to low sensitivity filters. It is estimated and compared the responses' sensitivity of modified chained filter and Chebyshev filter. It is proven that the attenuation of the even order chained filters is 6 dB less than the corresponding Chebyshev filter.