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A compact high-gain antenna with ultra wide bandwidth is proposed. A simple slot antenna offset fed by a microstrip line is used for excitation of short horn. Initial theoretical investigations are conducted to verify the effectiveness of the short horn in gain enhancement. Results show a wide impedance bandwidth from 2.86 to 20 GHz with a peak gain of 14.53 dBi at 14 GHz while an average gain of...
In this paper we report the gain enhancement of a UWB slot antenna through the use of a surface mounted short horn. The impedance bandwidth of the antenna, defined by the frequency band where the return loss is greater than 10 dB, is from 2.9 GHz 18.38 GHz i.e. with 15.5 GHz bandwidth. It has a peak gain of 11 dBi and the average gain over the frequency band is 8.70 dBi. The antenna is designed using...
A constant-gain ultra-wideband semi-circular disc monopole with a quasi-planar surface-mounted short TEM horn and a semi-circular reflector is proposed. The total length of the antenna is only 70 mm i.e. nearly 0. 67 λ at 2.86 GHz. The gain of the antenna is nearly constant: 6.5 ± 1.1 dBi from 2.86 GHz to 15 GHz, and 6.5 ± 0.7 dBi from 3.1 GHz to 10.6 GHz,. It has broad azimuth pattern and its compact...
An ultra-wideband printed monopole antenna, improved by attaching a short two-plate horn to its surface, is reported in this paper. The short horn, which has a slant length of 45 mm and a total physical height of 46.9 mm, significantly increases the gain of the printed monopole antenna at lower frequencies where the gain of the monopole is otherwise low, giving an almost flat gain over a 114 % bandwidth...
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