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In this paper, a X-band broadband antenna array with 4-elements is designed and fabricated. Firstly, various methods, such as multi-resonant and slot-coupling, are applied hybridly to broaden the bandwidth of the ordinary microstrip antenna element. Simulation results show that VSWR<2 bandwidth of the proposed antenna is over 50%, with center frequency of 10GHz. Then, in order to achieve high gain,...
In this paper, a kind of omnidirectional microstrip coaxial collinear (COCO) antenna array is designed, fabricated, and tested. The antenna is fabricated by standard printed circuit board technology (PCB), with overall dimension of 300×30×0.8mm3. The measured bandwidth of the antenna is about 4% with VSWR less than 1.4. The antenna has stably omnidirectional H-plane radiation patterns in the whole...
For the cosecant square beam pattern application of an 8-element antenna array, we designed a 8-way non-equal power-divider based on Wilkinson scheme. An improved suspended stripline(SSL) structure is proposed and analyzed here, by using which as planar transmission line, the designed power-divider has good performance in the insertion-loss, and the excitations for output ports agree well with the...
A low cost 4 ports microstrip line phase shifter is proposed. It is composed of the fixed substrate and the movable substrate. The simulation results show that it can realize equal variety of phase difference between nearby ports by moving the movable substrate, and the maximum phase difference ±215 degrees can be achieved at 2 GHz with the maximum deviation to the ideal line only 8°. The differences...
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