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Compact multiband and dual polarized radiating element for base station antenna

A radiating element and multi-band technology, which is applied in the structural form of radiating elements, antenna components, independent antenna unit combinations, etc., can solve the problem of limited number of base station antennas

Pending Publication Date: 2020-11-24
COMMSCOPE TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to local zoning regulations and / or weight and wind load constraints such as antenna towers, there is often a limit to the number of base station antennas that can be deployed at a given base station

Method used

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  • Compact multiband and dual polarized radiating element for base station antenna
  • Compact multiband and dual polarized radiating element for base station antenna
  • Compact multiband and dual polarized radiating element for base station antenna

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Embodiment Construction

[0023] Embodiments of the invention generally relate to radiating elements for multi-band base station antennas and to related base station antennas. Multi-band base station antennas according to embodiments of the present invention can support two or more major air interface standards in two or more cellular frequency bands, and allow wireless operators to reduce the number of antennas deployed at a base station, thereby reducing Tower rental costs while increasing speed to market capacity.

[0024] One challenge in designing multiband base station antennas is reducing the effect of scattering RF signals in one band by radiating elements in other bands. Scattering is undesirable because it affects the shape of the antenna beam in the azimuth and elevation planes, and these effects vary significantly with frequency, which can make it difficult to compensate for these effects. Also, at least in the azimuth plane, scattering tends to affect one or more of beamwidth, beamshape, ...

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Abstract

The present invention relates to a multiband antenna utilizing a compact multiband dipole radiating element having a plurality of arms, the dipole radiating element comprising a forward-facing arm anda backward-facing arm for higher and lower frequency bands, respectively. These higher and lower frequency bands may include, but are not limited to, a relatively wide frequency band (e.g., 1695-2690MHz) associated with the forward-facing arm and a slightly narrow and non-overlapping frequency band (e.g., 1427-1518 MHz) associated with the rearward-facing arm. The forward-facing arm may extend on a 'front' layer of the multilayer printed circuit board, and the rearward-facing arm may extend at least partially on a 'rear' layer of the printed circuit board. A resonant LC (or CLC) network is provided that is integrated into the rearward-facing arm and is at least capacitively coupled to the forward-facing arm. Such a resonant network advantageously supports low-pass filtering from a forward-facing arm to a backward-facing arm, thereby supporting multiple and non-overlapping frequency bands.

Description

technical field [0001] The present invention relates generally to radio communications, and more particularly to base station antennas for cellular communications systems. Background technique [0002] Cellular communication systems are well known in the art. In cellular communication systems, a geographical area is divided into a series of areas called "cells" served by respective base stations. A base station may include one or more antennas configured to provide two-way radio frequency ("RF") communications with mobile subscribers within a cell served by the base station. In many cases, each base station is divided into "sectors." In one common configuration, a hexagonal cell is divided into three 120° sectors in the azimuth plane, and each sector is served by one or more base station antennas with an azimuth angle of approximately 65° Half Power Beamwidth ("HPBW") to provide coverage for the entire 120° sector. Typically, base station antennas are mounted on towers o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q9/28H01Q1/38H01Q1/48H01Q19/10H01Q21/30
CPCH01Q9/285H01Q1/38H01Q1/48H01Q19/104H01Q21/30H01Q1/246H01Q5/42H01Q25/001H01Q5/314H01Q21/26H01Q1/24
Inventor 吴博P·J·必思鲁勒斯吴利刚闻杭生李曰民
Owner COMMSCOPE TECH LLC