首页|Wideband Millimeter Wave Antenna with Cavity Backed Slotted Patch and Magneto-Electric Dipole
Wideband Millimeter Wave Antenna with Cavity Backed Slotted Patch and Magneto-Electric Dipole
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This paper proposes a wideband cavity-backed slotted patch antenna,loaded with a magneto-electric(ME)-dipole and fed by a microstrip line,for millimeter wave(mm-Wave)applications.The coupled-feed cavity-backed slotted patch antenna is loaded with the ME-dipole.The slotted patch antenna serves as both a radiator and a ground for the ME-dipole.The combination of the ME-dipole antenna and the slotted patch antenna realizes a-10 dB impedance bandwidth covering over 22.86-44.35 GHz(63.9％).The pattern of the antenna element remains stable throughout this bandwidth.The proposed broadband antenna unit not only realizes single linearly polarized(LP)radiation but also can be designed for dual-LP radiation.The dual-polarized radiation can be achieved by changing the slot of the patch antenna to a crossed slot and altering the ME-dipole antenna to a dual-polarization form.A 2 × 2 dual-polarized array has been designed,fabricated,and tested.A novel dual-polarized feeding network is proposed.To achieve higher isolation,broadband in-phase feed and differential feed are adopted,respectively.A low-loss single to the differential structure is proposed for differential feeding.The simulated isolation of the array is higher than 40 dB.Measured results show that the dual-polarized 2x2 array has an overlapping bandwidth of 52.3％(|S11|＜-10 dB and|S21|＜-30 dB)with a peak gain of 14 dBi.The proposed antenna,featuring a wide overall bandwidth,low cost,and good radiation performance,is well suited for mm-Wave applications.
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