Title :
A phase modulator with gain for microwave millimeter-wave systems
Author_Institution :
Hughes Aircraft Co., Canoga Park, CA, USA
Abstract :
A method of achieving phase modulation directly at microwave and millimeter-wave frequencies with concurrent signal amplification is presented. The modulation is achieved with a voltage-controlled oscillator and circulator. The technique is demonstrated experimentally with the generation of a bi-phase coded signal at Ku-band with a signal gain of 10 dB. By cascading multiple VCOs in an injection-locked chain, additional gain and continuous phase variability are possible. A reduction in microwave hardware may be achieved in phase-coding system applications.<>
Keywords :
Gunn oscillators; modulators; phase modulation; solid-state microwave circuits; variable-frequency oscillators; Gunn diode; Ku-band; VCO cascade; bi-phase coded signal; biphase coding; circulator; concurrent signal amplification; continuous phase variability; injection-locked chain; millimeter-wave systems; phase modulator; phase-coding system applications; signal gain; voltage-controlled oscillator; Bandwidth; Diodes; Frequency; Millimeter wave radar; Millimeter wave technology; Phase modulation; Signal processing; Tuning; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99728
