Receiving apparatus
US6072999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1997 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Apr 1, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/20336
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A receiving apparatus is presented, in which a channel frequency can be selected over a wide band with an increased attenuation at an image frequency and/or at a local oscillation frequency by including a tunable filter having a following construction. Microstrip lines are connected between either one of the input or the output terminal or both of the input and output terminals of the tunable filter; a plurality of resonant circuits are formed by each of a plurality of coils and a plurality of variable capacitance diodes; and the coils are electromagnetically coupled and where a voltage applied to each cathode of each of a plurality of variable capacitance diodes through each of a plurality of resistors is controlled to tune a frequency to be received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.