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.