Title :
Grid oscillators with selective-feedback mirrors
Author :
Sun, Qi ; Horiuchi, Jason B. ; Haynes, Steven R. ; Miyashiro, Kevin W. ; Shiroma, Wayne A.
Author_Institution :
Dept. of Electr. Eng., Hawaii Univ., Honolulu, HI, USA
fDate :
12/1/1998 12:00:00 AM
Abstract :
Analytical and experimental results are presented that demonstrate the advantages of replacing the metal mirror of a C-band transistor-grid oscillator with two types of selective-feedback mirrors. The first mirror is a two-dimensional photonic crystal, whose frequency-, polarization-, and reflectivity-dependent characteristics result in higher radiated power, lower cross polarization, and improved locking. The second is a diode-loaded grating functioning as an electronically tunable mirror, which allows the oscillator to be amplitude-modulated
Keywords :
amplitude modulation; arrays; electromagnetic wave reflection; equivalent circuits; feedback; microwave oscillators; mirrors; AM; C-band transistor-grid oscillator; amplitude modulation; diode-loaded grating; electronically tunable mirror; microwave grid oscillators; quasi-optical arrays; selective-feedback mirrors; two-dimensional photonic crystal; Dielectric substrates; Frequency; Gratings; Mirrors; Oscillators; Photonic crystals; Polarization; Reflectivity; Sun; Tunable circuits and devices;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
