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Uhf broadband antenna

A wide-band antenna and antenna technology, applied in the direction of antenna, resonant antenna, mid-position feed between antenna endpoints, etc.

Inactive Publication Date: 2010-02-10
株式会社日立国际八木解决方案
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Likewise, since the above-mentioned two-element dipole antenna needs a length corresponding to about 0.5λ at the lower end frequency in the frequency band, if this dipole antenna needs to be made compact, then this length requirement of 0.5λ brings a question

Method used

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Examples

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Embodiment Construction

[0086] Embodiments of the present invention will be described in detail below with reference to the associated drawings.

[0087] Figures 1A to 1C A broadband antenna 10A for the UHF band according to a first embodiment of the present invention is shown. In this embodiment, the plate-like dipole vibrators 11a, 11b, each being a metal plate, have, for example, a substantially rectangular shape. The plate-shaped dipole vibrators 11a, 11b are arranged by leaving a predetermined interval "D" therebetween. The central portion of the antenna 10A, that is, the edge portions where the dipole elements 11a, 11b face each other, is fixed by a holder 12 made of an insulating material. The aforementioned dipole elements 11a, 11b are designed as follows. That is, for example, a complete length "L" of these dipole vibrators 11a, 11b is set to about 0.35λa; height "H" is set to be higher than or equal to about 0.06λa; thickness "t" is set to is set to be less than or equal to approximate...

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Abstract

In a UHF broadband antenna, a pair of dipole elements are provided. Each of the dipole elements is shaped into a rectangular plate. A power feeding point is provided on each of the dipole elements.

Description

[0001] This application is a divisional application of an invention whose application date is January 27, 2005, application number is 200510069793.3, the applicant is Yagi Co., Ltd., and the invention name is UHF broadband antenna. technical field [0002] The invention relates to a broadband antenna for UHF frequency band, which is used for ground wave broadcasting and communication in UHF frequency band. Background technique [0003] ISTB-T (Integrated Services Digital Broadcasting Terrestrial) programs have been implemented in limited areas of Japan since 2003, and are planned to be implemented in other areas of Japan by 2006. [0004] Like the aforementioned terrestrial integrated service digital broadcasting system, which uses electromagnetic waves in the UHF frequency band, its frequency range is expected to be extended to 470-770MHz. [0005] Conventionally, a two-element type dipole antenna is well known as an antenna for receiving UHF band electromagnetic waves (ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q9/26H01Q9/28H01Q19/10
Inventor 金子敦萩原修二松浦幹浩
Owner 株式会社日立国际八木解决方案