Practical implementation of large Butler matrices
Printed circuit board suppressing ringing in signal waveforms
Printed circuit transformer hybrids for RF mixers
Printed hybrid quadrature 3 dB signal coupler apparatus
Printed networks for improving electrical isolation at high freq
Printed wiring board with the characteristic impedance of wiring
Probe coupled waveguide multiplexer
Programmable attenuators
Programmable two-port microwave network
Pulse coupling apparatus, systems, and methods