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Antenna device

A technology of antenna device and transmission antenna, which is applied in the direction of impedance network, electrical components, multi-terminal pair network, etc., can solve the problems of large return loss and loss, and achieve the effect of improving antenna efficiency and ensuring communication quality

Active Publication Date: 2016-08-17
SUNWAY COMM BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that even in a 50 ohm environment where the insertion loss of the switch is very small, the switch directly connected to the transmitting unit will cause a lot of loss, especially in the low frequency band, this loss leads to a large return loss

Method used

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Embodiment Construction

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0017] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0018] In the present invention, terms such as "installation", "con...

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Abstract

The invention discloses an antenna device which comprises a feed point (hereinafter known as a single feed point), a transmission antenna, a low pass filter with an impedance converter of 50-100 Ohms, a low-frequency matching network, a high pass filter with an impedance converter of 50-100 Ohms,, a high-frequency matching network and a spst switch, wherein the spst switch is switched on when the antenna device is in a high-frequency matching state and is switched off when the antenna device is in a low-frequency matching state. According to the antenna device, the switch matching network structure is utilized, high frequency and low frequency are effectively subjected to 50-Ohm impedance matching, and the condition that the echo loss which is originally and usually caused by bad self impedance is poorer due to the self impedance of the switch in the low frequency band is avoided.

Description

technical field [0001] The invention relates to the technical field of antennas for mobile phones and handheld devices, in particular to an antenna device capable of impedance matching in high and low frequency bands. Background technique [0002] With the rapid development of electronic communication technology, mobile communication devices such as mobile phones are becoming more and more portable. Antennas in mobile communication devices are also miniaturized accordingly. Typically, when designing miniaturized antennas in larger mobile phones, the antenna's own impedance is far from 50 ohms even though the transmit antenna's bandwidth potential is good, and the return loss of the circuit's own impedance at low frequencies tends to be Return loss greater than the self-impedance of a high-frequency circuit. Passive matching components can often be used to obtain a bandwidth with a return loss less than the industry-recognized 6-dB in the low frequency band. In the high fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H7/38
Inventor 阿克塞尔·冯·阿滨王雷
Owner SUNWAY COMM BEIJING