Direction finding interferometer internal calibration system
US4494118A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1983 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Aug 18, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An internal calibration system is provided for use with a direction finding interferometer which comprises a plurality of receiving antenna elements (A.sub.1, A.sub.2), a local oscillator (20), a master receiving channel means (41), a receiving channel means (42), and a phase meter (92). The internal calibration system comprises a master switch (22), a master power divider and switch assembly (31), a power divider and switch assembly (32), two transmission lines (M.sub.1, M.sub.2) connected to the master switch assemblies (31, 32), an inter-channel transmission line (T.sub.12) connected to the master power divider and switch assembly (31) and to the other power divider and switch assembly (32), and a plurality of couplers (51, 52).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.