Novel planar double inversed-L antenna

A plane and antenna technology, applied in the field of plane double inverted-L antennas, can solve the problems of microstrip antenna size limitation, unfavorable mobile communication, large antenna size, etc., and achieve the effect of being convenient without medium loss, simple in structure, and large in gain.

Inactive Publication Date: 2012-08-08
SHANGHAI UNIV
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  • Description
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Problems solved by technology

[0004] Through the literature search of relevant materials, it is found that most of the proposed microstrip antennas are limited by size
In China, no new planar double-inverted L microstrip antenna has been proposed; in foreign countries, in July 2005, A.T.M.Sayem et al. published " A dual-band Hilbert slot antenna for GPS and Bluetooth application (a dual-band Hilbert slot antenna for GPS and Bluetooth applications)", in which it is proposed to open the Hilbert slot shape on the radiation patch to realize GPS and Bluetooth dual Frequency work, but the structure is more complicated, and the size of the antenna is also larger, which is not conducive to mobile communication

Method used

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  • Novel planar double inversed-L antenna

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Embodiment 1

[0018] Embodiment one: see figure 1 with figure 2 , the new planar double-inverted L-shaped antenna is composed of two patches 3, a feeder 2, a ground plate 4 and a short-circuit pin 1, and is characterized in that the two patches 3 are arranged side by side on the same plane to form a double-inverted L-shape In the upper half of the antenna, one patch 3 is connected to the ground plate 4 through the short-circuit pin 1, and the other patch 3 is connected to the ground plate 4 through the feeder line 2, and the short-circuit pin 1 and The feeder lines 2 are respectively located at the vertices of the two patches 3, and the feeding mode is coaxial feeding.

Embodiment 2

[0019] Embodiment 2: This embodiment is basically the same as Embodiment 1, and the special features are as follows: the lengths of the two patches 3 are both λ / 8. The distance between feeder 2 and short-circuit pin 1 is λ / 4. The medium used between the two patches 3 and the ground plate 4 is air. The unified modeling and simulation of the above-mentioned models is carried out, and the obtained results are as follows: image 3 As shown, the frequency characteristic of the present invention is the return loss parameter. Wherein, the abscissa represents the frequency component, and the unit is GHz; the ordinate represents the amplitude variable, and the unit is -dB. It can be seen that the return loss at 915MHz has reached -28dB, and a practical antenna has been obtained.

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Abstract

The invention relates to a novel planar double inversed-L antenna comprising two patches, one feeder line, one grounding plate and one short-circuit pin. The two patches are juxtaposed on the same plane to form the upper half part of the novel planar double inversed-L antenna, wherein one patch is connected with the grounding plate through the short-circuit pin, and the other patch is connected with the grounding plate through the feeder line. The short-circuit pin and the feeder line are respectively arranged on the apexes of the two patches. The novel planar double inversed-L antenna adoptsthe coaxial feeding form, has simple structure, small size and large gain, is easy to integrate and regulate, causes no dielectric loss and can be widely applied to the wireless communication field.

Description

technical field [0001] The invention relates to a novel planar double-inverted L antenna, which can be widely used in the technical field of wireless communication. Background technique [0002] In recent years, radio frequency identification (RFID) technology has received great attention in the fields of identification, management, and charging. With the development of computer technology and VLSI, radio frequency identification technology is widely used in industrial automation, commercial automation, traffic monitoring of automobiles and trains, automatic highway toll collection system, logistics management, security access inspection and other fields. RFID technology uses radio waves or microwaves for non-contact two-way communication to realize identification and data exchange functions. The RFID system mainly includes electronic tags and readers. Among them, the antenna of the reader plays a key role in the RFID system. [0003] There are many kinds of reader antenn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q13/08
Inventor 孙权杨卓琦沈旭陈文峰王子华
Owner SHANGHAI UNIV
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