Title :
Computer aided design of broadband microwave diode detectors using filter approximations
Author :
Al Anwar, Hesham I M ; Hashish, Essam A. ; El Hennawy, Hadia M S ; El Said, Mostafa
Author_Institution :
Fac. of Eng., Cairo Univ., Egypt
Abstract :
A new proposed computer aided method for the design of broadband microwave planar square law diode detectors is presented. In this method, a passive network is connected to the diode cathode, then this combination is modeled with an RLC load. Using the explicit formulas of filter approximations such as Butterworth and Chebyshev, a broadband matching network is synthesized between the RLC load and a resistive element which is not equal to the characteristic impedance. Then another matching network (filter) is synthesized between the resistive element and the characteristic impedance. This method produces diode detectors with low input VSWR over its useful broad bandwidth without using diode biasing (self bias) and without using resistance in the diode matching network. Examples of broadband square law Schottky barrier diode detectors with their analysis are presented to illustrate the design steps of the proposed method
Keywords :
Butterworth filters; Chebyshev filters; Schottky diodes; circuit CAD; detector circuits; impedance matching; microstrip circuits; microwave circuits; passive filters; Butterworth type; CAD; Chebyshev type; RLC load; Schottky barrier diode detectors; broadband matching synthesis; broadband microwave diode detectors; characteristic impedance; computer aided design; filter approximations; low input VSWR; passive network; planar square law diode detectors; Cathodes; Chebyshev approximation; Design methodology; Envelope detectors; Impedance; Matched filters; Microwave theory and techniques; Network synthesis; Passive networks; Schottky diodes;
Conference_Titel :
Radio Science Conference, 2001. NRSC 2001. Proceedings of the Eighteenth National
Conference_Location :
Mansoura
Print_ISBN :
977-5031-68-0
DOI :
10.1109/NRSC.2001.929415
