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This paper presents a new technology to realize a millimeter wave antenna with circular polarization. The antenna has a complex structure which consists of several dielectric slabs to achieve wideband, high-gain performance. Thank to the 3D printing technologies, the complex antenna can be easily fabricated with low cost. The proposed antenna has a wide impedance bandwidth of 50% from 45 to 75 GHz...
This paper presents a circularly polarized millimeter wave antenna by using a tapered polarizer. The polarizer consists of several air and dielectric slabs, which can be used to switch the polarization of the antenna from linear polarization into circularly polarization. Besides, with the tapered shaped, the polarizer can decrease the sidelobe of the radiation pattern and increase the gain of the...
A compact monopolar patch antenna is presented in this paper. The antenna has a wide bandwidth and a monopole-like radiation pattern. To reduce the whole size of the antenna, a substrate with high dielectric constant is adopted. Besides, three types of shorting pins and a triangle slot are added to the patch to widen the impedance bandwidth. The proposed antenna operates from 2.29 to 2.59 GHz for...
A millimeter wave antenna with wideband circular polarization is presented in this paper. It consists of a feeding aperture and a cylinder polarizer. The feeding aperture is used to achieve a good matching performance. While a cylinder polarizer located in front of the aperture is utilized to realize circular polarization. A low-cost three-dimensional (3D) printing technology is applied to fabricate...
A broadband patch antenna is presented for in this letter. It consists of two layers of substrate. The patch located at the top layer of the upper substrate for radiation while the ground plane located at the bottom layer of the lower one. Two differential L-probe are embedded in the lower substrate to obtain a wide impedance bandwidth (SWR<2) of 92.7%. Meanwhile, good radiation patterns are...
A novel differential-fed patch antenna (DFPA) is proposed in this letter. Based on a capacitance coupling feed, an impedance bandwidth (SWR<2) of 102% has been obtained. The cross-polarization is less than −15dB across the operating bandwidth because of the differential-fed.
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