Abstract
In this paper, a metasurfing (MS) concept is demonstrated and applied in the design of the low profile and wideband endfire antenna on metallic surface environments. The MS comprises an array of varying patch printed on homogeneous host medium, and fed by a surface wave launcher (SWL). Each row patch is designed according to the operating wavelength and by altering the surface reactance of the MS the surface-wave mode can be manipulated into the free-space wave mode. Meanwhile, two row of rectangle patches with same size are located on between the surface wave launcher (SWL) and non-uniform MS, which is regarded as an impedance modulation to obtain a good impedance matching. The VSWR of the proposed antenna is below 2.5 from 3.8 GHz to 16.7 GHz in the measured results, which are in good agreement with the simulated results and the thickness of proposed antenna is only 5 mm ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.065\lambda _{L}$ </tex-math></inline-formula> , <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\lambda _{L}$ </tex-math></inline-formula> is the free-space wavelength at the lowest operating frequency). Moreover, a stable end-fire beam and low side lobe level (SLL) is obtained in a wide frequency band, and the group delay and the time-domain result also are shown to prove the good wideband transmission.
Highlights
In recent years, it is popular in the design of wideband flushmounted endfire antenna owing to its wide applications in the aircraft, missile, and unmanned aerial vehicles
In [2], a monopole Yagi antenna with a folded top-hat monopole as the driven element and four short-circuited top-hat monopoles as parasitic elements is studied, it achieves a fractional bandwidth of 20.5% and a low profile of only 0.033λL
We propose a design of the low profile and wideband end-fire antenna using non-uniform MS, which can effectively reduce the longitudinal dimension of the antenna
Summary
It is popular in the design of wideband flushmounted endfire antenna owing to its wide applications in the aircraft, missile, and unmanned aerial vehicles. H-plane horn antenna is another typical design to meet the requirements of low-profile, vertical polarization and wideband end-fire radiation, and is initially showed in [8].
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