寬頻帶寬波束磁電偶極子天線設(shè)計(jì)
doi: 10.11999/JEIT140579 cstr: 32379.14.JEIT140579
基金項(xiàng)目:
國家自然科學(xué)基金(61271100, 61471389)和陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃項(xiàng)目(2012JM8003)資助課題
Broadband and Wide Beam Magneto-electric Dipole Antenna Design
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摘要: 為了展寬天線的波束寬度，在磁電(ME)偶極子天線的基礎(chǔ)上，該文設(shè)計(jì)出一種低交叉極化寬頻帶寬波束的新型磁電偶極子天線。通過將振子傾斜彎折，展寬了天線的波束寬度；結(jié)合6個(gè)寄生振子的對(duì)稱加載，提高了輻射方向圖的一致性。在型饋電結(jié)構(gòu)基礎(chǔ)上，優(yōu)化天線的振子間距和振子長度，實(shí)現(xiàn)了天線58.5%的相對(duì)帶寬(S11-10 dB)，頻帶范圍為2.3~4.2 GHz；對(duì)振子傾斜角度以及寄生振子的參數(shù)進(jìn)行優(yōu)化，在2.4~4.0 GHz的頻帶內(nèi)實(shí)現(xiàn)了輻射方向圖E面和H面同時(shí)達(dá)到120以上的半功率波束寬度(HPBW)。測(cè)試與仿真有較好的一致性，證明了所設(shè)計(jì)天線不僅具有寬頻帶寬波束特性，同時(shí)在整個(gè)頻帶范圍內(nèi)方向圖的一致性得到了極大地提高。Abstract: In order to broaden the antenna beamwidth, a broadband and wide beam Magneto-Electric (ME) dipole antenna with low polarization is designed based on the conventional ME antenna. By tilting and bending the dipoles, the beam width of the antenna is broadened; the consistency of the radiation pattern is improved by placing 6 parasitic patches symmetrically around the ground center. Optimizing the space between the dipoles and the length of the dipole based on the-shaped feed structure, a relative bandwidth of 58.5% (S11-10 dB) from 2.3~4.2 GHz is achieved. By optimizing the tilting angle and the parameters of the parasitic dipole, the Half Power Beam Width (HPBW) of E-plane and H-plane is simultaneously broadened to 120 in the frequency range from 2.4~4.0 GHz. The measurement results are in good agreement with the corresponding simulation, which not only prove that the broadband and wide beam characteristics of the designed antenna, but also extremely improve the consistency of the radiation pattern through the whole frequency band.
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Key words:
- Antenna /
- Magneto-Electric (ME) dipole /
- Parasitic monopole /
- Wide beam /
- Broadband /
- Consistency
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