Compact Radiofrequency Power Meter

摘要

A compact and versatile power meter is created through the use of a discrete component network providing for phased splitting and combining of signals obtained at taps along a transmission conduit having a predefined phase separation. The use of the discrete component network eliminates the need for bulky waveguides or microstrip antenna designs, the latter providing phase shift through their physical dimensions.

主权项

1. A radiofrequency power measurement device comprising:
an input for attachment to a radiofrequency power source for receiving forward radiofrequency power at a frequency for measurement; an output separated along a transmission path from the input and for attachment to a radiofrequency load for receiving reflected radiofrequency power at the frequency for measurement; a power conduit extending along the transmission path communicating power from the input to the output; a first and second power tap coupled to the power conduit and separated along the transmission path by an odd integer multiple of a quarter wavelength distance at the frequency; a discrete component network having four ports and receiving at a first and second port power and outputting at a third and fourth port power being a sum of power received at the first and second ports, the power at the third port from the first port shifted by an odd integer multiple of 90-degrees relative to the power at the third port from the second port, and the power at the fourth port from the second port shifted by an odd integer multiple 90-degrees relative to the power at the fourth port from the first port; a computer processor system receiving signals from the thud and fourth ports and communicating with a display to provide a display of radiofrequency power selected from the group consisting of forward power, reverse power, voltage and standing wave ratio.