The radiation characteristics and current distribution of a full wavelength dipole

IEEE Trans. Antennas Propagat.

Sun

Zhu

et al. 2020

A new method of designing full-wavelength dipoles (FWDs) is presented. A dual-polarized antenna is build based on FWDs for base station applications as an example. The antenna has four FWDs arranged in a square loop array form. The employed FWDs are bend upward to maintain a small aperture size, so that the realized element still fits in traditional base station antenna (BSA) array. The antenna is first matched across the band from 1.63 to 3.71 GHz, which can cover both the LTE band from 1.7 to 2.7 GHz and the 5G (sub-6 GHz) band from 3.3 to 3.6 GHz simultaneously. Then, band-stop filters are inserted in the feed networks of the antenna to suppress the radiation between 2.7 to 3.3 GHz. The antenna is fabricated and tested. Experimental results validate the simulation results. Comparing with the previously available FWD that has a bandwidth of 32%, the FWD proposed in this paper exhibits a much wider bandwidth of 78%. Moreover, this bandwidth is also comparable to and wider than those of the state-of-the-art BSAs based on half-wavelength dipoles (HWDs). The bandwidth enhancement and footprint reduction of the FWD in this work demonstrate a high potential of FWDs to be used in other applications.

Section: Introductionmentioning

confidence: 99%

Achieving Wider Bandwidth With Full-Wavelength Dipoles for 5G Base Stations

IEEE Trans. Antennas Propagat.

Sun

Zhu

et al. 2020

“…However, to the best of our knowledge, there are few published studies on full-wavelength dipoles. Offset-feeding [2][3][4] and dual/triple-feeding [5][6][7][8] are the only available methods published in the literature. Offset-feeding is realized by moving the feed point away from the center of the dipole.…”

Section: Introductionmentioning

confidence: 99%

“…Usually, the new feed point lies on one of the arms where the current reaches the peak. However, according to [3,4], the offset-feeding can deteriorate the radiation performance by introducing split lobes. Investigations in [5][6][7][8] show that a full-wavelength dipole can be better fed by employing additional feed points.…”

Section: Introductionmentioning

confidence: 99%

Wideband Matching of Full-Wavelength Dipole With Reflector for Base Station

IEEE Trans. Antennas Propagat.

Jones

Guo

et al. 2017

This paper introduces a wide-band hybrid feeding method for full-wavelength dipole antennas with a reflector. A full-wavelength dipole is designed to cover the band from 698 MHz to 960 MHz for cellular base station applications. Its matching circuit consists of a tripletuned circuit and a quasi-quarter-wavelength impedance transformer. The proposed matching circuit can provide balanced feeding as a balun and has a compact size. The working mechanism and a complete design scheme of the proposed matching circuit are elaborated. The matching circuit is designed and optimized using a circuit theory model and then physically realized using microstrip lines based on full-wave simulation. The measured reflection coefficient |S 11 | is <-14 dB across the entire band from 698 MHz to 960 MHz, exhibiting a bandwidth of 32%. This is the first time that a wideband centre-fed full-wavelength dipole is proposed.

“…However, to the best of our knowledge, there are few published studies on full-wave dipoles. Offset-feeding [2,3] and dual/triple-feeding [4,5] are the only available methods published in the literature. Offset-feeding is realized by moving the feed point away from the center of the dipole.…”

Section: Introductionmentioning

confidence: 99%

“…Usually, the new feed point lies on one of the arms where the current reaches the peak. However, according to [3], the offset-feeding can deteriorate the radiation performance by introducing split lobes. Investigations in [4,5] show that a full-wave dipole can be better fed by employing additional feed points.…”

Section: Introductionmentioning

confidence: 99%

Wideband feeding method for full-wave dipole

2017 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

Jones

Sun

et al. 2017

This paper introduces a wide-band feeding method for full-wave dipole antennas. A full-wave dipole is designed to cover the band from 698 MHz to 960 MHz for cellular base station applications. Its matching circuit consists of a laddertype filter design and a quasi-quarter-wavelength resistance transformer. The proposed matching circuit can provide balanced feeding as a balun and has a compact size. The matching circuit is designed and optimized using a circuit theory model and then physically realized using microstrip lines based on full-wave simulation. The simulated reflection coefficient |S 11 | is <-15 dB across the entire target band, exhibiting a bandwidth of 32%.