A wideband via fed circularly polarized microstrip antenna on a multi-layer substrate

Davidson, Kyle; Antar, Yahia M. M.; Freundorfer, A.P.

doi:10.1109/aps.2013.6711393

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Theoretically, a wide IBW can be reached by decreasing the Q-factor, which can be achieved by increasing the substrate thickness or decreasing the dielectric constant of the substrate [5][6][7][8]. On top of that, constructing the antenna on thick multi-layered substrates, foam, or full-air gap have also been studied; IBW obtained has shown to be approximately 20-40% and ARBW around 10-25% [9][10][11][12]. However, such implementation for onboard CP-SAR sensor poses several challenges considering existing mechanical vibrations that may affect the antenna structural stability and overall performance.…”

Section: Introductionmentioning

confidence: 99%

Development of a Low Profile Wide-Bandwidth Circularly Polarized Microstrip Antenna for C-Band Airborne Cp-Sar Sensor

Santosa¹,

Sumantyo²,

Urata³

et al. 2018

PIER C

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Abstract-In this paper, a low-profile wide bandwidth circularly polarized microstrip antenna is proposed as element for a C-band airborne circularly polarized synthetic aperture radar sensor. Several bandwidth improvement techniques were proposed and implemented. In order to increase impedance bandwidth, the antenna is constructed using double-stacked substrate with low dielectric constant, modified radiating shape for multi-resonant frequency, and a circle-slotted parasitic patch. Generation of the circularly polarized wave employs a simple square patch with curve corner-truncation as radiating element. The asymmetric position of the feeding is attempted to improve the axial-ratio bandwidth. To avoid a complicated feed network, the antenna is fed by single-feed proximity-coupled microstrip line. The effect of copper-covering on the upper layer for decrease undesired radiation wave emitted by the feeding is also studied and presented. Measurement results show that the impedance bandwidth and axial ratio bandwidth are 20.9% (1,100 MHz) and 4.7% (250 MHz), respectively. Meanwhile the measured gain is 7 dBic at the frequency of 5.3 GHz.

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Section: Introductionmentioning

confidence: 99%

Development of a Low Profile Wide-Bandwidth Circularly Polarized Microstrip Antenna for C-Band Airborne Cp-Sar Sensor

Santosa¹,

Sumantyo²,

Urata³

et al. 2018

PIER C

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show abstract

“…Most studies in CP microstrip antennas technology focus on broadening the impedance bandwidth (IBW), axial-ratio bandwidth (ARBW), and gain. A broad IBW can be reached by increasing the substrate thickness, decreasing the dielectric constant of the substrate, and constructing the antenna on thick multi-layered substrates [12,13]. Serial-sequential-rotation (SSR) technique has been introduced on CP subarray configuration for ARBW improvement [14].…”

Section: Introductionmentioning

confidence: 99%

Subarray Design for C-Band Circularly-Polarized Synthetic Aperture Radar Antenna Onboard Airborne

Santosa¹,

Sumantyo²,

Yam³

et al. 2018

PIER

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This paper presents the design and realization of a 4 × 4 broadband circularly polarized microstrip antenna as subarray element for airborne C-band circularly polarized synthetic aperture radar (CP-SAR). The main objective of this work is to optimize impedance bandwidth, axial-ratio bandwidth, gain, and radiation pattern of a CP-SAR array antenna due to the limitation in the available space for a large array antenna installation on airborne platform. Various patch separations in uniformly 2 × 2 subarray configuration have been simulated to investigate characteristics of impedance bandwidth, axialratio bandwidth, gain, and radiation pattern. In order to broaden impedance bandwidth, the proposed antenna is constructed by stacking two thick substrates with low dielectric constant and dissipation factor. The measured 10-dB impedance bandwidth is 0.91 GHz (17.2%), spanning from 4.83 GHz to 6.01 GHz. A simple square patch with curve corner-truncation is applied as the main radiating patch for circularly-polarized wave generation. The radiating patch is excited by single-fed proximity coupled strip-line feeding. The improvement of axial-ratio bandwidth in 2 × 2 and 4 × 4 subarray is employed by a feeding network with serial-sequential-rotation configuration. Experimental result shows the 3-dB axial-ratio bandwidth achieved 1.18 GHz (22.17%) from 4.8 GHz to 5.71 GHz. Other characteristic parameters such as gain and radiation pattern of the 4 × 4 subarray antenna are also presented and discussed.

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A wideband via fed circularly polarized microstrip antenna on a multi-layer substrate

Cited by 2 publications

References 4 publications

Development of a Low Profile Wide-Bandwidth Circularly Polarized Microstrip Antenna for C-Band Airborne Cp-Sar Sensor

Development of a Low Profile Wide-Bandwidth Circularly Polarized Microstrip Antenna for C-Band Airborne Cp-Sar Sensor

Subarray Design for C-Band Circularly-Polarized Synthetic Aperture Radar Antenna Onboard Airborne

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