Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By phase
Patent
1997-05-28
1999-06-01
Le, Dinh
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By phase
327 2, 327 8, 327350, 327100, 327244, 333136, H01P 512, H03D 1300
Patent
active
059091290
ABSTRACT:
A low-cost microstrip phase detector that is photo-etched onto a circuit board is disclosed. The phase detector is used to detect the phase difference between two high-power radio frequency (RF) signals. One RF signal enters a delay line causing the signal to experience a 180.degree. phase shift. The other RF signal is not phase shifted. Both RF signals are then input into a Wilkinson combiner circuit. The structure of the Wilkinson combiner is such that there is no voltage output from the combiner when the two input signals are exactly 180.degree. out of phase. When the original signals (before the delay line) are in-phase, there is no voltage output from the combiner. However, when the original signals are out-of-phase to begin with, they do not enter the Wilkinson combiner with a 180.degree. phase difference. Instead, the phase difference is greater than or less than 180.degree., depending on whether one input signal leads or lags the other input signal. The signals are not fully dissipated in the balancing resistors, but produce a resultant output voltage from the combiner. This output voltage is proportional to the phase difference and amplitude of the input RF signals. The output of the Wilkinson combiner is connected to a Schottky diode detector circuit that provides a DC output voltage indicative of the phase difference between the input RF signals. The output DC signal is then provided to a digital microcontroller.
Glenayre Electronics, Inc.
Le Dinh
LandOfFree
Low cost microstrip phase detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low cost microstrip phase detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low cost microstrip phase detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-957179