scholarly journals Design of a Missile-borne Conformal Microstrip Navigation Antenna

2018 ◽  
Vol 232 ◽  
pp. 04080 ◽  
Author(s):  
Junyan Wu ◽  
Jiaao Yu ◽  
Qin Tao
Keyword(s):  
Circular Polarization ◽  
Antenna Array ◽  
Radiation Pattern ◽  
Frequency Band ◽  
Navigation System ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Horizontal Direction ◽  
Microstrip Antenna Array

A missile-borne conformal dual-fed circular polarized microstrip antenna array is designed and fabricated, which realized omnidirectional radiation in horizontal direction. Frequencies of the antenna include GPS L1 frequency (1.575GHz) and Beidou navigation system B1 frequency (1.562GHz). Based on the HFSS simulation, the influence of conformation is analyzed on S11, axial ratio and gain of antenna array. The size of microstrip patches is changed so that the influence of conformation on antenna can be reduced. The circular polarization performance and the circular polarization gain of the antenna are also improved. The antenna array prototype is fabricated and measured. The result shows that the S11 parameter of the antenna is less than -10dB in the 1.55~1.60GHz frequency band. At the GPS L1 frequency and the Beidou B1 frequency, the maximum of horizontal omnidirectional gain is 1.73dB, 1.25dB respectively. The out-of-roundness of the radiation pattern is less than 2.5dB. The antenna has a good horizontal omnidirectional circular polarization radiation performance.

scholarly journals A New Design of a Wideband Miniature Antenna Array

2017 ◽  
Vol 7 (4) ◽  
pp. 1850
Author(s):  
Oulhaj Otman ◽  
Naima A. Touhami ◽  
Mohamed Aghoutane ◽  
Abdelmounaim Belbachir Kchairi
Keyword(s):  
Reflection Coefficient ◽  
Circular Polarization ◽  
Antenna Array ◽  
Frequency Band ◽  
Microstrip Antenna ◽  
Antenna Element ◽  
Wide Frequency Band ◽  
Microstrip Antenna Array ◽  
Miniature Antenna

In this work, we present a new configuration of a new miniature microstrip antenna array having a wide frequency band and with a circular polarization. The bandwidth is about 2GHz for a reflection coefficient under -10dB and centered on the ISM ‘Industrial Scientific Medical’ band at 5.8 GHz. To design such array, we have started the design by validating one antenna element at 10 GHz and after that by using the technique of defected ground, we have validated the antenna array in the frequency band [4 GHz -6 GHz] which will permit to miniature the dimensions. The final fabricated antenna array is mounted on an FR4 substrate, the whole area is 102.48 X 31.39 mm<sup>2</sup>  with a gain of 5dBi at 4GHz.

scholarly journals Design of a Small-Size Broadband Circularly Polarized Microstrip Antenna Array

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Pingyuan Zhou ◽  
Zhuo Zhang ◽  
Mang He ◽  
Yihang Hao ◽  
Chuanfang Zhang
Keyword(s):  
Reflection Coefficient ◽  
Antenna Array ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Satellite Communications ◽  
Lateral Size ◽  
Circularly Polarized ◽  
Feeding Technique ◽  
Microstrip Antenna Array

A small-size 2×2 broadband circularly polarized microstrip antenna array is proposed in this article. The array has four broadband dual-feed U-slot patch antenna elements with circular polarization, and the sequential feeding technique is used to further enhance the 3 dB axial ratio bandwidth. The lateral size of the fabricated array is as small as 1.33λ0×1.33λ0, and the profile is only 0.04λ0. Measured results show that the overlapped −10 dB reflection coefficient and the 3 dB AR bandwidth is 53%, and the variation of the measured realized gain is less than 1 dB for S-band satellite communications (1.98–2.2 GHz).

A Broad Band and Wide Beam Microstrip Antenna Array

2013 ◽  
Vol 427-429 ◽  
pp. 648-651
Author(s):  
Xiao Feng Xiong ◽  
Wei Dong Chen
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Broad Band ◽  
Operating Mode ◽  
Impedance Bandwidth ◽  
Axial Mode ◽  
Wide Beam ◽  
Microstrip Antenna Array ◽  
Helical Antennas

A novel broad band and wide beam microstrip helical antenna is proposed based on the modification of traditional helical antennas. Through selecting the appropriate operating mode between the axial mode and the normal mode, this new antenna can broad both the beamwidth and the bandwidth. To improve the gain of the antenna, An antenna array with 1*16 elements is designed and fabricated. Meanwhile, cavity-loaded feeding network is utilized for probe station measurement. The simulated impedance and radiation pattern are studied. The proposed antenna shows a wide impedance bandwidth from 7.6GHz to 9.6GHz for |S11|<-10dB, with wide 3dB beamwidth of E-plane about 1200, respectively.

scholarly journals A Compact Single-Feed Circularly Polarized Microstrip Antenna with Symmetric and Wide-Beamwidth Radiation Pattern

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Xihong Ye ◽  
Mang He ◽  
Pingyuan Zhou ◽  
Houjun Sun
Keyword(s):  
Circular Polarization ◽  
Radiation Pattern ◽  
Microstrip Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Compact Structure ◽  
Circularly Polarized ◽  
Wide Range ◽  
Half Power ◽  
Slot Aperture

A compact single-feed circularly polarized microstrip antenna is proposed to achieve symmetric radiation pattern over a wide range of observation angles. In order to reduce the radiation aperture and consequently broaden the circular polarization (CP) and the half power beamwidth (HPBW) of the antenna, a partially etched superstrate and a conducting cavity are employed in the design. Further, reasonable axial ratio (AR) and impedance bandwidths are realized within the compact structure by using a simple series crossed-slot aperture coupled feeding. As a consequence, the overall dimension of the fabricated prototype is 0.32λ0× 0.32λ0× 0.12λ0at the center operating frequency of 1.56 GHz, and a 3.0% overlapped bandwidth of 10 dB return loss (RL) and 3 dB AR is obtained. Within the bandwidth, symmetric CP radiation pattern over almost the entire upper hemisphere is observed and the HPBW is also increased from 60° to 106°.

scholarly journals A 2x2 Millimeter-Wave Microstrip Antenna Array for 5G Applications

2019 ◽  
Vol 4 (10) ◽  
pp. 55-58 ◽  
Author(s):  
G. Viswanadh Raviteja
Keyword(s):  
Dielectric Constant ◽  
Antenna Array ◽  
Millimeter Wave ◽  
Frequency Band ◽  
Loss Tangent ◽  
Microstrip Antenna ◽  
Wave Spectrum ◽  
Microstrip Antenna Array ◽  
5G Systems

In this paper, microstrip antenna array is designed and simulated for 5G applications. The array was designed with the intent to cover the millimeter-wave spectrum at 27GHz frequency. The substrate used in this antenna construction is Rogers RT Duroid 6002 with a loss tangent of 0.0012 and dielectric constant 2.94. The idea behind this research is to design antenna array for 5G systems able to operate in the frequency band of 24.25 – 27.5 GHz. Initially, a conventional antenna is designed. Thereby 2X1 microstrip antenna is designed and finally, a 2X2 antenna array is designed. In each stage, the antenna parameters such as S11 parameter, gain, and VSWR are calculated. Comparisons are also drawn concerning the directivity of the three antenna configurations discussed. For the end design which involves a 2X2 microstrip antenna array, the S11 is calculated to be -31.94 dB at the frequency of 26.78 GHz. The gain achieved was 11.02 dB and the directivity is found to be 11.12 dB. All the important findings from the simulations performed are tabulated.

HTS Microstrip Antenna Array for Circular Polarization With Cryostat

2005 ◽  
Vol 15 (2) ◽  
pp. 1048-1051 ◽  
Author(s):  
D.-C. Chung ◽  
C.-H. Yun ◽  
K.-H. An ◽  
S.-H. Lim ◽  
S.-Y. Choi ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Antenna Array ◽  
Microstrip Antenna ◽  
Microstrip Antenna Array
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