Harmonic rejection gated-switching mixer
Harmonic rejection mixer
Harmonic rejection mixer and method of operation
Harmonic tuning system for radio receivers
Harmonically pumped monolithic planar doped barrier mixer
Head supported portable radio assembly
Hearing aid coupled with a radio
Heat seal connector with integral parting agent
Heavy-duty audio equipment
Heavy-duty audio equipment
Heavy-duty audio equipment
Helical antenna for a portable radio apparatus
Hermetically sealed planar structure for high frequency device
Heterodyne laser detection
Heterodyne phase lock system
Heterodyne radio receiver with plural variable frequency local o
Heterodyne receiver
Heterodyne receiver
Heterodyne receiver for low noise and image frequency...
Heterodyne receiver with synchronous demodulation for receiving