Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 70, Issue 6, Pages 4507-4517Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2022.3140508
Keywords
1 bit; array antenna; beam steering; millimeter-wave (mm-wave) antenna; mobile terminals; reconfigurable
Funding
- National Natural Science Foundation of China [62101133, 61771277]
- Natural Science Foundation of Shanghai [21ZR1406800]
- National Key Research and Development Program of China [2017YFA0700203]
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A reconfigurable 1-bit millimeter-wave array antenna for mobile terminals is studied, consisting of four reconfigurable 1-bit microstrip patch antenna elements. By selecting the feeding direction, the 1-bit patch antenna elements achieve phase values of -pi and 0. The performance of the 1-bit four-element array is analyzed, and a fixed phase is applied to minimize the negative effects of phase quantization errors. Comparisons are made between the four-element arrays with and without fixed phases, demonstrating the potential of the fixed phase array for beam steering at various frequencies.
A reconfigurable 1 bit millimeter-wave array antenna for mobile terminals is investigated. The reconfigurable array antenna consists of four reconfigurable 1 bit microstrip patch antenna elements. Each patch antenna element is fed by a slot on the ground. The 1 bit patch antenna element with phase values of -pi and 0 is achieved by selecting the feeding direction of microstrip line. After analyzing the performance of the 1 bit four-element array, a fixed phase is applied to mitigate the negative effects of the 1 bit phase quantized error. The 1 bit four-element arrays with and without the fixed phases are compared in detail. The overlapped -10 dB impedance bandwidth of a prototype array at different beam directions reaches 3 GHz (25-28 GHz). Within the frequency range of 26-28 GHz, the array with the fixed phases can steer the main beam from -34 degrees to 35 degrees without grating lobes. Within these steering beams, the performances of good array gain, moderate sidelobe level, and low cross-polarization level are achieved.
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