Abstract
A multi-frequency patch antenna with double-sided parallel-strip line (DSPSL) periodic offset structure is proposed. The designed antenna consists of a simple rectangular patch as well as an embedded one-dimensional DSPSL periodic offset structure, which is employed to replace the traditional rectangular microstrip patch antenna. The periodic DSPSL structure is characterized leaky wave structure. After the periodic DSPSL structure is embedded, the resonance frequency of rectangular patch is offset, and the leaky wave characteristics can determine the number and position of new operating frequencies. As an application, a tri-band antenna is manufactured and these three operating frequencies can be calculated by the derived formulas studied in this communication. Experiment results suggest that the antenna can work at 4.28, 4.78, and 6.42 GHz, respectively. The results of simulated, measured and calculated show high consistency.
Highlights
The concept of microstrip antenna was originally proposed by Deschamps in 1953 [1]
Two one-dimensional periodic offset elements are placed in the substrate of traditional patch antenna
When the period element of the double-sided parallel-strip line (DSPSL) periodic structure has a length l = 19 mm and a width T = 16 mm, and change the size of rectangular patch. It can be seen when f0 is located in the leaky wave operating band of n = −2 Floquet harmonic of periodic DSPSL structure, the proposed antenna will have tri-band
Summary
The concept of microstrip antenna was originally proposed by Deschamps in 1953 [1]. Microstrip antennas have been extensively adopted in personal wireless communications for their advantages of light weight, small size, and ease of manufacture [2], [3]. The fields of traditional microstrip patch antenna extend the effective open circuit beyond the edge. The relative parameters of the rectangular patch are given as follows [4] c W= εr + 1 − 2 (1) L =
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