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Feeding Network with Phase Shifters for a Ka-band Antenna Array

Schmid, Bernd (2007) Feeding Network with Phase Shifters for a Ka-band Antenna Array. DLR-Interner Bericht. DLR-IB 554-07/01. Diploma. Hochschule Ravensburg-Weingarten. 55 S.

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This work aims at the development of a feeding network with 5-Bit phase shifters for an active phased array at approximately 30 GHz. Due to the short wavelengths, high packaging density is necessary for the feeding network of an antenna operating in Kaband frequencies. This antenna array has a modular assembly, it is composed of single 4x4 subarrays which are arranged side by side to form the whole array. A modular assembly makes easier the manufacturing of the antenna, since the smaller modules can be manufactured individually and in the same way. Additionally, the maintenance is easier since single modules can be replaced when they fail instead of replacing the whole antenna. To control the 16 phase shifters of a 4x4 subarray, 80 control signals and 16 power supplies are required in addition to the radio frequency (RF) circuit. Due to this complexity, it is started to develop a less extensive 2x2 subarray in this work which will be extended to a 4x4 subarray. Two alternative microstrip feeding circuits for a 2x2 subarray were developed. In order to evaluate the performance of the RF circuits including phase shifters, two printed circuit boards were designed, one for each feeding network. The phase shifters on the printed circuit boards (PCB) can be controlled and the output signals can be measured. In the end it is shown how the 2x2 feeding networks can be extended to form the 4x4 subarray and how those can be assembled to form a phased array antenna.

Item URL in elib:https://elib.dlr.de/47579/
Document Type:Monograph (DLR-Interner Bericht, Diploma)
Title:Feeding Network with Phase Shifters for a Ka-band Antenna Array
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:February 2007
Refereed publication:No
Open Access:No
Number of Pages:55
Keywords:phase array, phase shifter, Ka-band, feeding network, antenna
Institution:Hochschule Ravensburg-Weingarten
Department:Elektrotechnik und Informatik
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation
Institute of Communication and Navigation > Navigation
Deposited By: Greda, Dr.-Ing. Lukasz
Deposited On:12 Mar 2007
Last Modified:27 Apr 2009 13:35

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