scholarly journals Opto-microwave Butler matrixes based front-end for a multi-beam large direct radiating array antenna

2017 ◽  
Author(s):  
M. A. Piqueras ◽  
T. Mengual ◽  
O. Navasquillo ◽  
Michel Sotom ◽  
G. Caille
Keyword(s):  
Array Antenna ◽  
Front End

scholarly journals GNSS Array Antenna for Mitigating Multipath Errors in Urban Environment

2019 ◽  
Vol 94 ◽  
pp. 03009
Author(s):  
Toshiaki Tsujii ◽  
Kenta Yonebayashi ◽  
Takeshi Fujiwara ◽  
Sohshi Ohsawa
Keyword(s):  
Urban Environment ◽  
Array Antenna ◽  
Test Results ◽  
Front End ◽  
Rf Front End ◽  
Hardware Biases ◽  
Proper Weight ◽  
Multipath Errors

GNSS signal vulnerability has been a major concern especially for safety-of-life applications such as aircraft operations. Therefore, a GNSS array antenna technology was investigated focusing on beamforming to mitigate multipath errors in urban environment including airport surfaces. A commercial three-element GNSS antenna and RF-Front end were used to obtain digital IF data. The recorded In-phase/Quadrature IF data for three antennas were combined with proper weight to form beams towards satellites after so-called hardware biases were calibrated. Test results in multipath-rich environment demonstrated that 50-70% reduction of pseudorange errors due to multipath were possible if the beamforming algorithms were applied.

Substrate integrated waveguide fed printed dipole array antenna for isolating the RF front-end from the antenna

2008 ◽  
Vol 51 (2) ◽  
pp. 557-562 ◽  
Author(s):  
Chen Yu ◽  
Wei Hong ◽  
Z. Q. Kuai ◽  
J. X. Chen ◽  
Ling Tian ◽  
...  
Keyword(s):  
Array Antenna ◽  
Substrate Integrated Waveguide ◽  
Front End ◽  
Rf Front End

Millimeter-Wave Slot Array Antenna Front-End for Amplitude-Only Direction Finding

2020 ◽  
Vol 68 (7) ◽  
pp. 5365-5374
Author(s):  
Mohamed K. Emara ◽  
Daniel J. King ◽  
Hoang V. Nguyen ◽  
Samer Abielmona ◽  
Shulabh Gupta
Keyword(s):  
Millimeter Wave ◽  
Direction Finding ◽  
Array Antenna ◽  
Front End

scholarly journals Design and simulation of an analog beamforming phased array antenna

2020 ◽  
Vol 10 (2) ◽  
pp. 1398
Author(s):  
Mohamed Elhefnawy
Keyword(s):  
Phase Shift ◽  
Antenna Array ◽  
Phased Array ◽  
Axial Ratio ◽  
Array Antenna ◽  
Design System ◽  
Phased Array Antenna ◽  
Front End ◽  
Rf Front End ◽  
Simulation Results

In this paper, a phased array antenna is designed and simulated. The antenna array consists of four circularly polarized slotted waveguide elements. The antenna array is simulated using CST MWS. The simulation results for the proposed antenna array at different values of progressive phase shift demonstrate that the S‒parameters for all four ports are less than ‒10 dB over at least 2% bandwidth, the simulated maximum gain is 13.95 dB, the simulated beamwidth can be 19˚ or narrower based on the value of the progressive phase shift. , the range of frequencies over which the simulated Axial Ratio (AR) is below 3 dB is not fixed and varied according to the selected progressive phase shift. The proposed four-element RF front-end is simulated using Advanced Design System (ADS) at operating frequency of 9.6 GHz. The obtained simulation results by ADS indicate the feasibility of implementing the proposed RF-front end for feeding the antenna array to realize analog beamforming.

Low-voltage BIMOS AM front-end amplifier

1990 ◽  
Vol 137 (1) ◽  
pp. 57 ◽  
Author(s):  
M. Steyaert ◽  
Z. Chang
Keyword(s):  
Low Voltage ◽  
Front End
Sign in / Sign up

Export Citation Format

Share Document