Title :
A Very High-Order Subharmonically Injection-Locked Oscillator Using a Resonant-Tunneling HEMT
Author :
Kamogawa, Kenji ; Toyoda, Ichihiko ; Tokumitsu, Tsuneo ; Fukuyama, Hiroyuki ; Yamamoto, Masafumi ; Tanaka, Masayoshi
Author_Institution :
NTT Wireless Systems Laboratories, 1-1 Hikari-no-oka, Yokosuka-shi, Kanagawa 239-0847, Japan. Tel: +81-468-59-3464 Fax: +81-468-55-2106, E-mail: kamogawa@mhosun.wslab.ntt.co.jp
Abstract :
A novel high-order subharmonically injection-locked oscillator (ILO) using a resonant-tunneling HEMT (RTHEMT) is presented. Due to the strong nonlinear characteristic of RTHEMT´s, the monolithic ILO can be locked for higher-ordersubharmonics as highas 128. The ILO exhibits an adjacent spur levelas low as ¿30 dBc for all subharmonic factors. In addition, the degradation rate of phase noise against subharmonic factors is close to 6 dB/octave, the same as that of ideal frequency multipliers. This is the highest-order subharmonically injection-locked oscillator yet reported.
Keywords :
Frequency measurement; HEMTs; Injection-locked oscillators; Laboratories; MMICs; Phase measurement; Phase noise; Power harmonic filters; Power system harmonics; Resonant tunneling devices;
Conference_Titel :
Microwave Conference, 1998. 28th European
Conference_Location :
Amsterdam, Netherlands
DOI :
10.1109/EUMA.1998.338021
