Vertical-polarization differential-feed slot antenna based on printed circuit board
A printed circuit board, differential feeding technology, applied in the field of slot antennas, can solve problems such as large loss, and achieve the effects of low cost, easy mass production, and stable performance
Active Publication Date: 2013-09-18
常州安塔歌电子科技有限公司
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[0023] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0024] refer to figure 1 , figure 2 , the antenna includes a substrate 1 based on printed circuit board technology, which has a front surface 11 and a reverse surface 12 opposite to it. The shapes of both sides of the substrate 1 can be rectangular, square or rectangular according to specific applications and shell designs. any other shape. A differential feed ring 3 is printed on the front side 11, and a differential feed chip 31 is soldered. Since the area of the feed ring is small, some additional peripheral circuits can be placed in the peripheral area 32 of the front side 11 of the substrate to realize corresponding Features. The reverse side 12 is a complete piece of metal with printing grooves 2 on it. The material of the substrate 1 can be FR-4 or other media, and its dielectric constant will determine the slot length and resonanc...
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The invention provides a vertical-polarization differential-feed slot antenna based on a printed circuit board. The slot antenna comprises a substrate, a printed slot and a differential feed ring; the printed slot is positioned at the back side of the substrate and is composed of an upper slot and a lower slot which are vertically connected with each other; the differential feed ring is positioned at the front face of the substrate and is positioned right above the lower slot; and two ends of the differential feed ring are directly connected with two differential feed ports of a differential feed chip. Through adjusting the electric medium constant of the substrate and the size of the upper slot, the resonant frequency of the antenna is adjusted, therefore the slot antenna is applied to various frequency bands; through adjusting the line width and the line length of the differential feed ring, the length of the lower slot, the feed position and the thickness of the substrate, the matching of the impedance of different ports is realized, therefore the slot antenna is applied to various differential output chips; as the feed circuit and the matching circuit from the differential end to the single end is removed, the antenna is convenient for mass production and has the advantages of low cost and stable property.
Description
technical field [0001] The invention belongs to the field of antenna design of wireless communication technology, in particular to a vertically polarized and differentially fed slot antenna based on a printed circuit board. Background technique [0002] In recent years, with the development of radio frequency technology and the popularization of wireless identification, more and more devices have integrated wireless sensor chips and radio frequency tags. Most of these chips and tags feed the antenna in the form of differential ports, and provide the corresponding port impedance to the antenna designer. In the traditional design, for this kind of differential port, the impedance of the chip port is converted to the traditional single-ended 50Ω port by using the differential to single-ended conversion and impedance matching circuit, and the standard impedance and interface (SMA) are provided, and the external 50Ω Impedance designed antenna. This type of scheme has good versa...
Claims
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Login to View More IPC IPC(8): H01Q1/38H01Q15/24H01Q1/50
Inventor 张志军王涵曹晓京
Owner 常州安塔歌电子科技有限公司