High isolation dual-polarized broadband antenna for base stations

Abstract

A broadband (1.71–2.17 GHz), high isolation, and dual‐polarized suspended plate antenna (SPA) is presented. Modified L‐probe feed is used for broadband matching and capacitive coupling. Port isolation between two orthogonally polarized channels is improved by making extensions on suspended plates (SPs) and inserting a vertical ungrounded square tube under the first SP (SP1). The prototyped SPA resulted in 8 ± 0.5 dBi gain and 67° ± 6° symmetric E‐plane and H‐plane radiation patterns with low cross‐polarization levels. Return losses ≤−15 dB and port isolation ≤−30 dB are achieved in the entire band. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:603–607, 2015

Enhancing characteristics of dual‐polarized BTS element antenna using metal director

“…The isolation of the proposed antenna is better than References , , , , and . Furthermore, it can be found that a little amount of HPBW in this work is higher than that in References and .…”

“…Impedance bandwidth of 52% (1.7‐2.9 GHz) and a stable gain of ~8 dBi are the features of this antenna. In Reference , two suspended coppers are employed to obtain the frequency range 1.5 to 2.37 GHz with gain of 8 ± 0.5 dBi. In Reference , additionally loops are embedded into the conventional crossed loop dipole antenna to achieve the frequency range 1.68 to 2.83 GHz with gain of 8.8 ± 0.7 dBi.…”

“…In Reference , additionally loops are embedded into the conventional crossed loop dipole antenna to achieve the frequency range 1.68 to 2.83 GHz with gain of 8.8 ± 0.7 dBi. Despite various methods that have been used to widen the frequency bandwidth in References , they suffer from inappropriate impedance matching especially at frequency 1.9 to 2.5 GHz. There are some advantages in dual polarized BTS antennas that make them suitable for GSM, CDMA or LTE applications.…”

VHF suspended plate transmitter antenna design for DVB‐T and DAB‐T

“…. Probe feeding mechanism is utilized to enhance the bandwidth of stacked patch antennas . Despite of giving good impedance bandwidth by the antennas reported in Refs.…”

“…Probe feeding mechanism is utilized to enhance the bandwidth of stacked patch antennas. [5][6][7][8][9][10] Despite of giving good impedance bandwidth by the antennas reported in Refs. [1,[3][4][5][6][7], they give poor radiation performance in the sense of cross polarization levels.…”