Wideband circular polarization directional antenna array based on single double-face printing circuit plate

A double-sided printing, array antenna technology, applied in circuits, antennas, antenna arrays, etc., can solve the problems of complex structure, antenna separation, and complex assembly, and achieve the effect of simple antenna structure, wide-axis ratio bandwidth, and reduced manufacturing costs.

Active Publication Date: 2014-08-20
TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

When used in base station antennas, it is necessary to use the form of an array to increase the antenna gain, but the feed network of this type of

Method used

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  • Wideband circular polarization directional antenna array based on single double-face printing circuit plate
  • Wideband circular polarization directional antenna array based on single double-face printing circuit plate
  • Wideband circular polarization directional antenna array based on single double-face printing circuit plate

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[0029] The following describes the implementation of the present invention in detail with reference to the drawings and embodiments.

[0030] Such as figure 1 , Figure 2a with Figure 2b As shown, a broadband circularly polarized directional array antenna based on a single double-sided printed circuit board includes a dielectric substrate 2, a serial feed network 1 on the front of the dielectric substrate 2, and a slotted floor 3 on the back of the dielectric substrate 2. Among them, the material of the dielectric substrate 2 is FR4, the dielectric constant is 4.4, the loss tangent value is 0.02, and the plate thickness is 1 mm.

[0031] Four unit slot antennas 6 are etched on the slotted floor 3, and each unit slot antenna 6 is composed of a ring slot and two mutually perpendicular square slots connected to the edge of the ring slot. The four unit slot antennas 6 are divided into two rows and two columns with equal row and column spacing. A square slot on each unit slot antenna 6...

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Abstract

A wideband circular polarization directional antenna array based on a single double-face printing circuit plate comprises a dielectric substrate, a crossfeed network located on the front surface of the dielectric substrate, a grooved floor located on the reverse surface of the dielectric substrate, a reflecting plate located under the dielectric substrate and a nylon pillar connecting the dielectric substrate and the reflecting plate. Four unit groove antennas are etched in the grooved floor, each unit groove antenna is composed of an annular groove and two square grooves separately by 90 degrees, and four square grooves are further etched in the edges of the grooved floor to improve the gain characteristic of the array. A microstrip line of the tail end of the crossfeed network crosses the two square grooves of each unit groove antenna on the grooved floor, thereby exciting the unit groove antennas. Unit circular polarization is achieved through two orthogonal modes of the annular groove antennas and a feed method with the phase difference of 90 degrees, and a 2*2 antenna array is achieved through the crossfeed network. The wideband circular polarization directional antenna array based on the single double-face printing circuit plate can cover a wider frequency band, and meanwhile is simple in structure, low in cost, capable of being formed at one time and good in process consistency.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a broadband circularly polarized directional array antenna based on a single-chip double-sided printed circuit board. Background technique [0002] Due to the special polarization characteristics of circularly polarized antennas, the receiving and transmitting antennas have flexible alignment angles; and with the rapid development of modern mobile communication technologies, mobile communication systems need to cover a wider frequency band to support multiple communication technologies . Therefore, there is an increasing demand for circularly polarized antennas with wide axial ratio bandwidths. At the same time, most base station antennas use directional antennas, so the present invention is a broadband circularly polarized directional antenna. [0003] Many broadband circularly polarized element antennas have been proposed, such as crossed dipoles, coplanar waveguide wide slo...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/50H01Q21/00
Inventor 蒋晓镭张志军李越冯正和
Owner TSINGHUA UNIV
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