| 摘要 |
<p>The present invention features a dual mode, meander line loaded antenna (400) having an additional wideband plate or hat (404) located above the horizontal top surface (104) of the antenna. The upper plate (404) is spaced a predetermined distance above the antenna and held in place by dielectric blocks (414) of a predetermined thickness. By properly spacing the additional plate, simultaneous wideband and narrowband reception can be performed. The added upper plate generally does not interfere with the usual narrowband operation of the original antenna structure. The modified antenna can accept radio frequency signals across a wide range of frequencies. The additional upper plate can be retrofitted to existing meander line loaded antennas to modify them for dual mode operation.</p> |
