NDLI: Experimental evaluation of a beamforming array calibration system

Content Provider	IEEE Xplore Digital Library
Author	Adithya, A.H. Yikun Huang Weber, R.J.
Copyright Year	2014
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Montana State Univ., Bozeman, MT, USA (Adithya, A.H.; Yikun Huang; Weber, R.J.)
Abstract	We have developed an automatic calibration system for arbitrary shaped array. A signal generator drove a horn antenna to provide a signal source and a spectrum analyzer was connected to the output of an 8 - channel beamformer to collect data. The entire interface was automated using LabVIEW, which included a program to upload the weights to the beamformer, control system for the signal generator, spectrum analyzer and a rotator. Our calibration method involved connecting each of the eight channels on the beamformer to an eight to one relay that would select one channel to pass through to the output of the relay. Then we connected one port of a vector network analyzer (VNA) to the output of the 1 to 8 relay and the other port of the VNA to the output of the beamformer. The algorithm for calibration would have the VNA apply a weight to one of the channels at a time, and the VNA would read the output. A LabVIEW program would switch through all eight channels storing the applied weights and the outputted weights. Then it would compare all eight weights and find the channel with the largest error and correct that channel. The program would loop until the total error was within a user set threshold. After calibration we ran beamforming and nullsteering tests in the anechoic chamber at various angles to test the accuracy of the beam or null point angle, the side lobe level and the depth of null. The test results show that the calibrated array has a much improved beam pattern comparing with the one without calibration and it is very close to the simulated pattern. We improved the general accepted approaches by introducing an automatic system with a properly defined calibration procedure, thus freeing people from tedious, time consuming calibration process.
Sponsorship	IEEE Aerosp. Electron. Syst. Soc.
Starting Page	1
Ending Page	7
File Size	2014226
Page Count	7
File Format	PDF
e-ISBN	9781479916221
DOI	10.1109/AERO.2014.6836524
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-03-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calibration Arrays Array signal processing Mutual coupling Antenna arrays Relays Antenna measurements
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

A frequency agile beamforming array

Model based antenna array calibration for digital beamforming systems

Frequency-Domain Digital Calibration and Beamforming with Wideband Antenna Array

Mutual Coupling in Beamforming with Circular Array

Large phased array antenna calibration using mutual coupling method

An experimental evaluation of antenna array calibration to compensate the mutual coupling effect

The correction of mutual coupling and the amplitude and phase error based on digital beamforming receiving antenna

Methods and Bounds for Antenna Array Coupling Matrix Estimation

Mutual coupling calibration of transmitting array

Experimental evaluation of a beamforming array calibration system

Similar Documents

A frequency agile beamforming array

Model based antenna array calibration for digital beamforming systems

Frequency-Domain Digital Calibration and Beamforming with Wideband Antenna Array

Mutual Coupling in Beamforming with Circular Array

Large phased array antenna calibration using mutual coupling method

An experimental evaluation of antenna array calibration to compensate the mutual coupling effect

The correction of mutual coupling and the amplitude and phase error based on digital beamforming receiving antenna

Methods and Bounds for Antenna Array Coupling Matrix Estimation

Mutual coupling calibration of transmitting array

Experimental evaluation of a beamforming array calibration system