Ferrite modulator assembly for beacon tracking system
US4539681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1983 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Feb 25, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J99/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A modulator system for converting a three-channel input microwave signal to a single-channel output microwave signal is formed of two microwave sections which are joined together at both their inputs and their outputs by hybrid circuits, one of which serves as a power divider and the other which serves as a power combiner. Each of the microwave sections includes a pair of couplers which are joined by a Faraday rotator. First and second microwave input signals are applied to a first port of an input coupler in each of these sections. A third microwave signal is connected by the hybrid divider to a second input port in the input couplers of each of the microwave sections. Polarization of the third signal is vertical and is maintained through the two sections. Polarization of the first and second signals is horizontal and is maintained through the two sections. With activation of the rotator, a shift in polarization occurs resulting in appearance of the signals in both the horizontal and vertical components of an output coupler in each of the sections. The vertical component of the output couplers in each of the sections is combined by the hybrid combiner to produce the single-channel…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.