Dielectric loaded cavity filters for non-actively cooled applications in proximity to the antenna
US7457640B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2005 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Jan 2, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2086
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dielectric-based RF device such as a tower mounted amplifier (TMA), mast-head amplifier (MHA), or Tower Mounted Boosters (TMB) includes a housing having a plurality of cavities and an input and an output, the input being coupled to the antenna and the output being coupled to a base station. The housing includes a transmission path with a transmit filter. The housing further includes a receive path with at least one receive filter and a low noise amplifier. The receive filter includes a plurality of cavities with a dielectric-based resonator disposed in at least some of the plurality of cavities. In one aspect, the RF device has a volume of less than about 155 in3. The RF device including the dielectric-based resonators has excellent out-of-band signal rejection with low loss. In addition, the RF device described herein is small enough to mount close to the antenna. The dielectric-based RF device has superior performance characteristics and a smaller footprint than conventional air cavity-based TMAs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.