Terrestrial broadcast wave reception-use antenna device and component of same
US9553555B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2012 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Jul 31, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is a terrestrial broadcast wave reception-use antenna device having performance that is equivalent to or better than that of a conventional device in frequency bands at or below an FM band even if an antenna element length is shortened to approximately 55 [mm]. An amplifier (12-A) is configured so as to include a compound semiconductor HEMT for amplifying a received wave having a frequency at or below a resonant point of an antenna element (10) among received waves of the antenna element (10), the compound semiconductor HEMT having an equivalent noise resistance of 2 [Ω] or smaller for the received frequency so that a noise figure (NF) is approximately constant over a wide frequency band at or below the FM band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.