Whip antenna assembly and method of manufacture
US4086596A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1976 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Mar 22, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is disclosed an antenna including an accurately formed whip member and an accurately formed loading coil one end of which is connected to one end of the whip member and the other end of which is connected to a single connector. The length of the whip member and its diameter and any associated metallic connector are selected to give a predeterminedly accurate capacitive value. The loading coil has a predeterminedly accurate inductive value such that the loading coil and whip member have a net accurate inductive value which is connected to a predeterminedly accurate capacitor for matching the impedance of the antenna to the conductor, coaxial cable for example, from the transmitter. The capacitor, a single stub connector, the end of the coaxial cable and the necessary connections are epoxy encapsulated in a base housing. The connector at the end of the loading coil is attached to the single stub connector in the base to provide the only connection necessary for the antenna to become operative. The loading coil is very accurately formed by a two-step molding process wherein the turns are first held in position by a first molding step followed by a second overmolding step which c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.