Linearly polarized omnidirectional antenna
US4369449A · kind A · utility
Inventor
Key dates
| Filing date | Jun 1, 1981 |
| Grant date | Jan 18, 1983 |
| Priority date | — |
| Expiry date | Jun 1, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/16
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A linearly polarized omnidirectional antenna includes one or more dipoles having an elongated tubular conductive radiator of a length that is about half the wavelength of the midband frequency, and an elongated inner conductive member extending longitudinally through the interior of the radiator and spaced therefrom. A coaxial cable or other feed means conducts signals to and from one end of the radiator and to and from the inner conductive member. The impedances of the dipole and the feed means are matched over a selected frequency band, such as by the use of a series inductive reactance between the feed means and the radiator. Two such dipoles can be connected to a colinear, center-fed pair, and two or more such dipole pairs can be arranged in a colinear array having a common inner conductive member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.