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Adaptive array antenna

An array antenna and self-adaptive technology, which is applied in antennas, antenna radiation patterns, diversity/multi-antenna systems, etc., can solve problems such as hindering main beam tracking and increasing gain, and achieve the goal of reducing calculation, increasing gain, and realizing correction Effect

Inactive Publication Date: 2005-05-18
KOKUSA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not effective for interfering waves and fading
Furthermore, following the utilization of wide cell spacing with Figure 16 The combination method of the interference suppression type shown cannot make the gain larger, because the width of the element spacing hinders the tracking of the main beam

Method used

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  • Adaptive array antenna
  • Adaptive array antenna
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Examples

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Embodiment Construction

[0064] Hereinafter, various embodiments of the present invention corresponding to the first object will be described with reference to the accompanying drawings.

[0065] (first embodiment)

[0066] figure 1 A first embodiment of an 8-element array antenna is shown. Array antenna #1 includes antenna elements 51-54 and array antenna #2 includes antenna elements 55-58. The spacing between the array antenna elements of array antenna #1 and array antenna #2 is about λ / 2. The distance (a few λ) between array antenna #1 and array antenna #2 makes the correlation sufficiently small to be negligible.

[0067] The signals from each antenna element 51-58 are combined by signal summer 59 via weighting circuits 81-88 which adjust the phase and amplitude of the antenna output and outputs. The weighting amounts of the weighting circuits 81 - 88 are controlled by the adaptive signal processing device 60 . Adaptive signal processing can be of the interference rejection tracking type or ...

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PUM

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Abstract

An adaptive array antenna consisting of a plurality of array antennas comprising a plurality of antenna elements spaced apart at intervals exhibiting strong correlation, the array antennas being separated at intervals with negligible correlation spaced, in which diversity effects such as fading compensation are produced, interference waves from the same direction are eliminated, the amplification gain is tracked through the main beam, and there are one or more correction signal coupling sections and multi-beam combining circuits in order to eliminate the correction signal. individual differences and complete calibration with high reliability.

Description

Technical field: [0001] The invention relates to an adaptive array antenna and a method for calculating the correction amount of the adaptive array antenna receiving system and a correction method. Background technique: [0002] In general, adaptive array antennas are used for beam steering of array antennas. There are two algorithms used for beam steering, they are interference rejection tracking type and maximum gain tracking type. In the interference suppression tracking type, the tracking is done by making the null point to the interfering wave and making the strong directivity to the desired wave. In the maximum gain tracking type, tracking is accomplished by maximizing the receive level of the antenna. In each type, the mobile station can be tracked by the main beam. Currently, the spacing between array antenna elements is usually λ / 2, such as Figure 12 shown. The reason is that when the interval is larger than λ, such as Figure 13 As shown, grating lobes may ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q3/26H04B7/04H04B7/08
CPCH01Q3/2605H01Q3/2611H01Q3/2629H01Q3/2635H01Q3/267H04B7/04H04B7/0842H04B17/20
Inventor 山口良
Owner KOKUSA ELECTRIC CO LTD