Unidirectional bowtie array antenna with incision gap for digital video broadcasting‐T2 base station

Abstract

This study presents a unidirectional bowtie array antenna with incision gap for a digital video broadcasting‐T2 base station application. The antenna element consists of a bowtie radiator with incision gap on top of a square reflector. The element achieves a bandwidth of 82.35% for |S11| of <−10 dB, covering a frequency range of 450–1080 MHz. The antenna array comprises of four identical antenna elements mounted vertically to form an antenna array. The simulated and measured results of the antenna array show a good impedance matching for |S11| of <−10 dB along a frequency range of 450–1014 MHz (77.05%). The measured gains are 13.4–16.1 dBi along an operating frequency of 470–862 MHz with the narrow half‐power beamwidth in the vertical plane of ∼15° ± 5° and the half‐power beamwidth in the horizontal plane of ∼60° ± 5° for a frequency range of 470–666 MHz and 90.5° for 862 MHz. The radiation pattern is degraded at the frequency higher than 950 MHz.

Double-Dielectric Microstrip Ultrahigh-Frequency Antenna for Digital Terrestrial Television

“…The monopole antenna [5] has a gain of 1.7 dBi, which is very low compared to that of other DTV antennas. In order to increase the gain, a solution was proposed in [6] that was based on a unidirectional array of bowtie antennas with an incision gap. The measured gain for this antenna array was 13.4-16.1 dBi.…”

Miniaturized Wideband Loop Antenna Using a Multiple Half-Circular-Ring-Based Loop Structure and Horizontal Slits for Terrestrial DTV and UHD TV Applications

“…For DTV transmitting antennas, a unidirectional 1 × 4 circular bow-tie dipole array antenna with incision gaps on top of a square ground plane was proposed [ 26 ]. It covered the 450–1014 MHz frequency band with gain of 13.4–16.1 dBi in the frequency range of 470–862 MHz.…”

A Full-Band Digital Television Transmitting Antenna Array With Dual-Layer Bowtie Dipole Unit

“…In order to broaden the operating bandwidth much further, several dipole antennas for DTV transmitting are proposed [14]- [16]. In the papers [14], [15], two stereoscopic antennas with compensated baluns are introduced.…”

“…By using the modified baluns, the relative bandwidths under VSWR < 1.15 are enhanced to 37.2% and 44.6%. In [16], a bowtie antenna with incision gap is proposed. Due to the wideband antenna unit, the relative bandwidth reaches 77.1% under the VSWR < 2, and the high gains are 13.4 dBi -16.1 dBi within the frequency range of 470 MHz -862 MHz.…”