论文信息 - 18-30 GHz Broadband Bandpass Harmonic Reject Filter

18-30 GHz Broadband Bandpass Harmonic Reject Filter

An 18-30 GHz harmonic reject filter has been designed using a distributed prototype. The aspect ratio of the coupled suspended stripline structure is chosen to equalize the even- odd-mode electrical lengths when considering the open-end effects, The measured insertion loss is about 1 dB in the passband and more than 40 dB rejection up to twice the center frequency.

[1] S. Cohn. Parallel-Coupled Transmission-Line-Resonator Filters , 1958 .

[2] J. Rhodes,et al. Design formulas for stepped impedance distributed and digital wave maximally flat and Chebyshev low-pass prototype filters , 1975 .

[3] R. Jansen,et al. Accurate Wide-Range Design Equations for the Frequency-Dependent Characteristic of Parallel Coupled Microstrip Lines , 1984 .

[4] E. G. Cristal. New Design Equations for a Class of Microwave Filters (Correspondence) , 1971 .

[5] D. R. Decker,et al. MMIC's - The next generation of microwave components , 1980 .

[6] R. A. Dell-Imagine. A Parallel Coupled Microstrip Filter Design Procedure , 1970 .

[7] L. Q. Bui,et al. Millimeter-Wave Diplexers with Printed Circuit Elements , 1985, 1985 IEEE MTT-S International Microwave Symposium Digest.

[8] J. Smith. The Even and Odd Mode Capacitance Parameters for Coupled Lines in Suspended Substrate , 1969 .

[9] C. Gledhill,et al. Exact Solutions of Stepped Impedance Transformers Having Maximally Flat and Chebyshev Characteristics , 1969 .

[10] T. Itoh,et al. A Generalized Spectral Domain Analysis for Coupled Suspended Microstriplines with Tuning Septums , 1978 .