Controlled antenna tuner
US4380767A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1980 |
| Grant date | Apr 19, 1983 |
| Priority date | — |
| Expiry date | Oct 27, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/40
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A controlled antenna tuner comprises a power amplifier and a microprocessor, an attenuator connected to the power amplifier for selectively controlling the power output, a low pass filter connected to the power amplifier and microprocessor for channel frequency selection, a vertical standing wave ratio (VSWR) circuit inductively connected to the low pass filters output for determining the VSWR of the antenna, an impedance (magnitude) bridge and a phase detector bridge selectively connected to the low pass filter RF output and to the microprocessor for sensing the tuning status of an antenna, and an LC tuner network connected to the phase detector bridge and microprocessor, the microprocessor processing outputs of the impedance and phase detector bridges into tuning signals for the LC tuner to tune the antenna to the selected channel and storing the tuning signals for the selected channel for future use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.