Antenna switch
US5138329A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Mar 22, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/244
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention relates to an antenna switch for radio telephones, which are provided with an extendible external antenna (1) and a built-in internal antenna (2). The antenna switch comprises a microswitch (4) having a switch arm (6) and a press switch (5). The antenna switch accomplishes the switching-on of the microswitch (4), whereupon the signal route is connected with the internal antenna (2). Respectively, when the external antenna (1) is moved in the reverse direction, the signal route is connected with the external antenna (1). The switch arm (6) is in direct contact with the external antenna (1) so that the contact accomplishes the switching-on of the microswitch (4), when the external antenna (1) is in a partly pushed-in position. The switch arm (6) is situated in close vicinity to the lowest part (15) of the external antenna (1) when the external antenna (1) is in its extended extreme position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.