beam steering

Beam Steering Phased Array Antenna With Fully Printed Phase Shifters Based on Low Temperature

Sintered BST Composite Thick Films

Under the Guidance ofDr I. Govardhani

By A.Roja

152040011

Introduction

• Antenna is a transducer which converts one form of energy into another form.

• From radio frequency to AC and vice versa.• Basic concepts of antenna includes:• Gain • Return loss• Directivity • VSWR

Phased array antenna

• Phased Array Antenna consists of 3 sections a) Feeding Network b) Antenna Elements(micro strip antenna) c) Phase Shifters

Layout of PAA

Feeding Network

• It divides power equally to the branches to modify phase.

• Micro strip power divider is commonly used.• To distribute input signal to the antenna elements.

Antenna Elements

• Antenna is operated at 3GHZ (S Band)• It consists of 3 conducting layers which is fabricated

on Substrate.• A Thick substrate is used to increase bandwidth of

antenna.

Design analysis

• The array antenna consists of four antenna elements which is placed along axis on the thick substrate of 0.64cm.

• A feeding network is connected to all the four antenna elements which is used as power divider.

• The operating frequency is 7 GHZ.

Simulation Results

Gain (db)

VSWR

Radiation pattern

References• [1] M. Nikfalazar et al., “Frequency extension of the fully printed phase

shifter by paste composite optimization,” in Proc. German Microw. Conf. (GeMiC), Mar. 2015, pp. 146–149.

• [2] M. Nikfalazar et al., “Fully inkjet-printed tunable s-band phase shifter On bst thick film,” in Proc. 44th Eur.Microw. Conf. (EuMC), Oct. 2014, pp. 504–507.

• [3] C. Kohler et al., “Effects of ZnO-B O addition on the microstructure And microwave properties of low-temperature sintered barium strontium Titanate (BST) thick films,” Int. J. Appl. Ceramic Technol., vol. 10, pp. 200–209, May 2013.