This paper presents the design details of an integrated 4x4 element dual
feed dual circularly polarized microstrip antenna array in the S-band.
The dual circular polarization is achieved by the use of quadrature
hybrids. Power division for the dual input array is achieved through
two 1x16 equal split equal phase corporate feed networks. The
quadrature hybrids and corporate feeds for the proposed array are
designed in multilayer printed circuit boards (PCB) in stripline
configuration. This antenna can be used to transmit or receive both
right-handed circularly polarized (RHCP) waves or left-handed
circularly polarized (LHCP) waves simultaneously or one at a time by
terminating the other port with 50O resistance. The proposed antenna
has 700MHz of 10 dB impedance bandwidth (27%), 400MHz of 3dB
axial ratio bandwidth and 300MHz of 3dB gain bandwidth centred at
2.5GHz with a peak gain of 15.5dB in both polarizations. It has a 3dB
beam width of 26° and cross-polarization levels below 20dB in both the
polarizations. Design and simulation of patch array, quadrature
hybrids and 1x16 corporate feeds in multilayer configuration, PCB
stack-ups, fabrication, integration and testing processes are discussed
in detail. The effect of thermal protection system (TPS) of the re-entry
vehicle on antenna performance parameters was studied and presented.
S. Femina Beegum1, Manoj Joseph2, Saji Joyas3, M. Jayakumar4, J. Girija5
Cochin University of Science and Technology, India1, Indian Space Research Organization, Thiruvananthapuram, India2,3,4,5
Antenna Array, Corporate Feed, Dual Circular Polarization, LHCP, Multilayer, Quadrature Hybrid, Reentry Vehicles, RHCP, S-band, Stripline
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| Published By :
ICTACT
Published In :
ICTACT Journal on Communication Technology
( Volume: 15 , Issue: 3 , Pages: 3229 - 3235 )
Date of Publication :
September 2024
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35
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