A novel amplifying antenna array using patch-antenna couplers-design and measurement
Tóm tắt
This paper proposes a novel amplifying antenna array using the patch-antenna coupler formed by placing one or two open-ended microstrip lines (coupled lines) near and along the nonradiating edge(s) of a patch antenna. An X-band five-element array with broadside 25-dB Chebyshev radiation is demonstrated. When the input signal is fed to the center element, with most of the power radiating from the antenna, part of it is tapped to the coupled lines, amplified by an FET amplifier, and fed to the next antenna element. This process is repeated after all the antenna elements are fed with suitable power. The amplitude distribution of the fields radiated from the antennas is controlled by the coupling coefficient from the patch to the coupled line, which, in turn, is governed by the coupling length and gap between the patch and line. The measured return loss of the designed five-element array is -27 dB at the center frequency of 10 GHz with 2% 10-dB bandwidth. The radiation pattern possesses a transmitting gain of 15.9 dB, a half-power beamwidth of 17/spl deg/, and a sidelobe level of -22 dB.
Từ khóa
#Antenna arrays #Antenna measurements #Microstrip antenna arrays #Microstrip antennas #Patch antennas #Chebyshev approximation #Antenna accessories #FETs #Power amplifiers #Frequency measurementTài liệu tham khảo
yang, 1998, novel active antenna amplifying arrays, IEEE MTT-S Int Microwave Symp Dig, 997
pozar, 1998, Microwave Engineering
gonzalez, 1997, Microwave Transistor Amplifiers Analysis and Design
balanis, 1997, Antenna Theory Analysis and Design
10.1109/75.324708
10.1109/74.262628
navarro, 1996, Integrated Active Antennas and Spatial Power Combining
10.1109/22.910550
mortazawi, 1998, Active Antennas and Quasi-Optical Arrays
york, 1997, Active and Quasi-Optical Arrays for Solid-State Power Combining
10.1109/APS.1989.134720
10.1109/APS.1985.1149537
10.1109/22.873889