Diversity antenna system with electrical tilt

An antenna system, electrical tilt technology, applied in diversity/multi-antenna systems, antennas, combinations of antenna units with different polarization directions, etc.

Inactive Publication Date: 2009-08-12
QUINTEL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Operators of cellular wireless networks are faced with an ever-increasing demand for transmission capacity, but are subject to planning or zoning constraints that limit the deployment of new sites or the addition of additional antennas to existing sites

Method used

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  • Diversity antenna system with electrical tilt
  • Diversity antenna system with electrical tilt
  • Diversity antenna system with electrical tilt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 440

[0125] Embodiment 440 requires only ten filters 456A, 456B, etc. due to the use of the third feeder F63 for the space diversity receive signal. The third feeder F63 does not transmit the transmit signal with much higher power than the receive signal, so this feeder F63 may have a smaller diameter and higher loss than the first and second feeder F61 and F62. The acceptable power loss of the third feed line F63 is limited by the gain and dynamic range of the LNAs 464A and 462B and the height at which the antenna assemblies 454A and 454B are mounted on a conventional antenna support pole (not shown). A third feeder F63 may be enclosed in a common sheath (not shown) with one of the first and second feeders F61 and F62 to simulate a dual feeder arrangement.

[0126] now refer to Figure 7 , shows yet another antenna system 540 of the present invention, which is referenced Figure 6 A simplified version of the antenna system described. It is suitable for use with adjacent frequen...

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PUM

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Abstract

A diversity antenna system with electrical tilt has two dual polarised, tilt adjustable antenna stacks (44A) and (44B) with physical separation providing space diversity. Each antenna stack (44A) or (44B) has two polarisations associated with independently adjustable electrical tilt angles. The electrical tilt angles of each antenna stack (44A) or (44B) are controlled to be equal to those of the other antenna stack to provide co- polarisation or anti-polarisation tilt coupling. The antenna system (40) may operate with multiple carrier frequencies each associated with a respective pair of polarisations of different antenna stacks (44A) and (44B) with co-polarisation or anti-polarisation tilt coupling. Antenna tilt angles are controllable so that different carrier frequencies are associatedwith independently adjustable angles of electrical tilt. The system may be used with groups of both contiguous and non-contiguous carrier frequencies.

Description

technical field [0001] The present invention relates to a diversity antenna system with electrical tilt, that is, a phased array antenna system with space diversity and electrical tilt capabilities. It is relevant to many antenna systems such as those used in telecommunications, eg cellular mobile radio networks, commonly known as mobile telephone networks. Such networks include second generation (2G) mobile telephone networks implemented by cellular wireless standards such as GSM and third generation (3G) mobile telephone networks implemented by cellular standards such as Universal Mobile Telephone System (UMTS). Other cellular wireless standards include IS 95 and WCDMA2000. Background technique [0002] Operators of traditional cellular wireless networks typically use their own base stations, each connected to one or more antennas. In such networks, antennas are the primary factor in defining the desired coverage area, which is typically divided into multiple overlapping...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04B7/10H01Q1/24H01Q21/24
CPCH01Q1/246H01Q21/24H04B7/10
Inventor P·E·哈斯克尔L·托马斯S·T·纽博尔德D·E·伯克
Owner QUINTEL TECH
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