Estimates for the partial capacitance of a printed circuit board via

✍ Scribed by Johan C.-E. Sten; Tommi Dufva

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 206 KB
• Volume: 20
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19990205)20:3<160::aid-mop3>3.0.co;2-e

✦ Synopsis

Figure 4

Measured power output of oscillator as a function of bias voltage from y6 to y6.6 V, the oscillator offers nearly the maximum specified rated power output of the diode.

A CAD technique is presented for the design of a suspended strip-line Gunn diode oscillator with an inductive termination consisting of a short inductive line length followed by a section of an evanescent mode waveguide with a shorted end. It is shown that, with the diode-equivalent circuit parameters known within an accuracy of about 40%, the program provides an initial inductive line length within an accuracy of about 10%. The correct value of the inductive length at which the oscillations take place is obtained experimentally by iterating the length within the computed range. By feeding this correct value of the inductive line length back into the program, the load resistance required for maximum power transfer is obtained. The procedure minimizes the number of experimental iterations required for realizing an oscillator with maximum power output.