Comparison of Auxiliary Antenna Concepts Designated For ECCM Applications

Slomian, Izabela; Raniszewski, Adam; Piasecki, Przemyslaw

doi:10.23919/irs48640.2020.9253939

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…The works for Maisel's SLB system performance evaluation have been performed [4][5][6][7][8][9][10][11][12][13][14]. And the set of two different antennas having different radiation patterns has been proposed in order to achieve better coverage of sidelobe of the main antenna [15]. A SLB system with multiple auxiliary antennas have been presented to reduce the number of false target blips on radar plan position indicator (PPI) [16].…”

Section: Introductionmentioning

confidence: 99%

Improved Sidelobe Recognition Method Using Boresight Error in a Uniform Circular Array for Wideband Direction Finding System

et al. 2021

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A strong signal through the antenna sidelobes can be interpreted as a main lobe signal and may cause a major angle error in the direction finding system. An auxiliary antenna channel in the Maisel's sidelobe blanking system increases the cost, and the method using each boresight error (BSE) of the monopulse and interferometer causes many errors in the real antenna. In this paper, a sidelobe recognition method applicable to a wideband uniform circular array without auxiliary antenna channel is proposed. Four boresight errors are obtained from monopulse and interferometer in the circular array and then the maximum value of differences between boresight errors is taken and is compared to the optimal threshold value. The results have the effect of reducing errors occurring in the sidelobe region while maintaining the performance in the main lobe region. To validate the proposed method, a circular array antenna with eight wideband microstrip antennas is designed and manufactured. As a result, there is a significant improvement in the error rate compared to the existing method. It is confirmed that there is no error when the threshold value is from 0.5° to 0.7°at 6, 9, and 12 GHz, and the error rate is less than about 1 % when the threshold value is between 0.4°and 1.0°. INDEX TERMS Array antenna, circular array, sidelobe recognition, sum-delta monopulse, interferometer This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.

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Section: Introductionmentioning

confidence: 99%

Improved Sidelobe Recognition Method Using Boresight Error in a Uniform Circular Array for Wideband Direction Finding System

et al. 2021

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Uplink Throughput Enhancement by Employing Transmit-only AUX Antennas at Nomadic Terminals: A Capacity Analysis

Kumar¹,

Pillai²

2022

2022 National Conference on Communications (NCC)

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Rejection of Surface Clutter in Far Sidelobes for Airborne Radars

Yoon,

Park,

Roh

2024

J. Electromagn. Eng. Sci

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In airborne radar, false alarms caused by surface clutter returns through antenna sidelobes need to be suppressed to detect the target of interest. Sidelobe blanking is widely used to reject false alarms. Ideally, an auxiliary antenna radiation pattern should cover entire sidelobes of the main antenna radiation pattern. However, this may not always be satisfied, especially in the case of far sidelobes (FSL) of the main antenna, for various reasons. In this work, rejection techniques for false alarms caused by surface clutter returns through FSL are proposed. The distortion of the measured angle and velocity of the surface clutter are explained, and a measurement process for estimating the true location and velocity of the clutter is derived. Subsequently, two techniques for false alarm rejection are presented. The first technique is based on the look-up table (LUT) of FSL, which is robust but not practical due to the time and cost required to build a LUT with sufficient resolution. In the second technique, false alarms are rejected when they satisfy predefined criteria derived from their common characteristics, and flight test results confirm that false alarms can be effectively rejected by applying the second technique.

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Comparison of Auxiliary Antenna Concepts Designated For ECCM Applications

Cited by 3 publications

References 2 publications

Improved Sidelobe Recognition Method Using Boresight Error in a Uniform Circular Array for Wideband Direction Finding System

Improved Sidelobe Recognition Method Using Boresight Error in a Uniform Circular Array for Wideband Direction Finding System

Uplink Throughput Enhancement by Employing Transmit-only AUX Antennas at Nomadic Terminals: A Capacity Analysis

Rejection of Surface Clutter in Far Sidelobes for Airborne Radars

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