Direction finding antenna
US4494121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1982 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | May 10, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q11/105
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A direction finding antenna for use in missiles and the like may include arrays of log periodic monopole antennas. The antennas may be constructed of thin, metallic stub regions laminated to an insulative support backing as a part of a wing of a missile. The antennas are triangular in shape in order to provide improved performance and to conform to the shape of wings on the missile. The antennas perform an aerodynamic function as parts of the wings as well as performing an electromagnetic function in the direction finding system. The antennas are provided with parallel feed lines which extend along the base of the triangular antenna, connecting with antenna stubs on both sides of the support backing, and connecting together at the forward end of the antenna. The antenna stubs are generally rectangular metallic sheets arranged in order of increasing length on the support backing. Electrically longer antenna stubs may be provided with zig-zag convolutions for improved performance at lower radio frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.