Abstract
In this paper, a gain-enhanced patch antenna with a periodic microstrip rampart line is proposed. The periodic microstrip rampart line can modify the effective dielectric constant of the dielectric plate, and help to improve the gain of the traditional microstrip patch antenna. Based on the antenna design principle, a formula for calculating the gain-enhanced frequency point is proposed. A proposed high gain microstrip antenna is designed, fabricated and tested. The experimental results demonstrate that the gain of the proposed antenna reaches 10.0 dBi, which is 2.55 dB or 79.9% higher than that of the traditional patch antenna at the same operating frequency of 5.8 GHz. The measured and simulated results show a high consistency.
Highlights
The microstrip patch antenna was proposed in the 1950s [1]
This paper proposed a gain-enhanced patch antenna with a periodic microstrip rampart line
The proposed antenna consists of a rectangular patch, a substrate embedded with periodic leaky wave structure and a complete ground plane
Summary
The microstrip patch antenna was proposed in the 1950s [1]. It has been widely studied and developed. Extensive research has been carried out to widen its operating bandwidth in impedance [2], [3]. With the growth of the communication distance, the gain of the traditional patch antennas cannot meet the actual needs in some cases [4], [5]. Improving the gain of traditional patch antennas is crucial. The highgain antenna could be used in mid-range or high-data-rate communications for compensation of propagation loss
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