Matkapuhelimen antenni antenn f?r mobiltetefon

A wireless telephone, portable technology, applied in the direction of electrical short antenna, antenna, folded antenna, etc., can solve the problems of resonance frequency shift, frequency band narrowing, etc.

Inactive Publication Date: 2004-03-31
HITACHI CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when using a conventional portable radiotelephone antenna, the antenna element 102 must have a certain height because the ground portion 101 of the printed circuit board is close to the antenna element 102, resulting in a narrow frequency band.
In addition, since the inverted F-shaped antenna is easily affected by the printed circuit board ground (circuit board ground), the position of the circuit board ground changes with the opening and closing of the upper housing and the lower housing like a foldable mobile phone. , its resonant frequency will shift

Method used

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  • Matkapuhelimen antenni antenn f?r mobiltetefon
  • Matkapuhelimen antenni antenn f?r mobiltetefon
  • Matkapuhelimen antenni antenn f?r mobiltetefon

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Embodiment Construction

[0016] figure 1 (a) is a perspective view, (b) is a side view in an opened state, and (c) is a plan view of important parts. The portable radiotelephone antenna (hereinafter referred to as "antenna"), such as figure 1 As shown in (a) and (b), there are radiating element portion 10 excited at a constant resonance frequency, wiring board ground 32, and LCD ground 23. The radiation element part 10 and the circuit board ground wire 32 are connected through the ground wire connection part 42 , and the circuit board ground wire 32 and the LCD ground wire 23 are connected through the circuit board ground wire connection part 41 and can be switched. Further, a strip-shaped power supply member 43 is provided on the radiation element portion 10 to be adjacent to the ground connection portion 42 so as to hang down. The power supply point 44 is between the end of the power supply component 43 and the circuit board ground wire 32 .

[0017] Radiating element section 10, such as figu...

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Abstract

A mobile phone antenna has: a first conductive radiation element that is formed in a sheet metal conductor and resonates at a predetermined resonance frequency; a second conductive radiation element that is formed in the sheet metal conductor and resonates at the predetermined resonance frequency; and a ground that is connected through a conductive ground connector with the second conductive radiation element. The ground is placed such that the ground is not opposed to the first and second conductive radiation elements.

Description

technical field [0001] The present invention relates to an antenna for a portable radiotelephone, particularly capable of widening its frequency band without elevating the position of an antenna element, and suppressing the use of a position-variable structure such as a circuit board ground wire in a foldable portable telephone or the like Portable radiotelephone antenna for resonant frequency error of the portable radiotelephone. Background technique [0002] Portable phones and PHS-Personal Handy-phone System (PHS-Personal Handy-phone System) phones are equipped with retractable whip antennas and built-in flat-panel antennas for smooth transmission and reception of signals with ground stations. The most representative panel antenna is an inverted F-shaped antenna with a small and simple structure and broadband characteristics. [0003] Figure 8 Indicates an antenna for a conventional portable radiotelephone. The inverted F-shaped antenna 100 as an antenna for this porta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/08H01Q1/24H01Q1/38H01Q5/10H01Q5/371H01Q9/04H01Q9/42
CPCH01Q9/0421H01Q1/243H01Q5/0058H01Q9/0442H01Q1/08H01Q5/371H01Q1/38H01Q1/48H01Q9/26H01Q9/42H01Q5/10H01Q5/40
Inventor 堀田均杉山刚博片冈慎高场进一
Owner HITACHI CABLE
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