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A polarization reconfigurable antenna using metasurface superstrate is proposed in this paper. The proposed antenna consists of a planar coupling slot with an array of metallic rectangular patches with PIN diodes which can be view as a reconfigurable metasurface superstrate, and a DC bias controlling circuit. When the PIN switches are OFF, the antenna can produce left-hand circular polarized (LHCP)...
A wideband and low-profile circularly polarized antenna using metasurface for WLAN or satellite communication applications is proposed. The proposed antenna consists of a planar slot coupling antenna with an array of metallic rectangular patches which can be viewed as a metasurface. The metasurface is utilized to adjust axial ratio (AR) for circularly polarized radiation and the slot is angled at...
In this paper, a new miniaturized ultra-wideband (UWB) antenna fed by coplanar waveguide (CPW) is proposed. Gear-shaped structures are employed around the circular disc radiator to impove the current distribution for the antenna miniaturization. Moreover, the gear-shaped structures can produce a wide impedance bandwidth and miniaturization structure. The antenna exhibits a wider bandwidth characteristic...
The near-zero refractive index metamaterials (ZIM) have attracted more and more attentions because of their novel properties. In this paper, a theoretical analysis of a patch antenna with different ZIM superstrates has been given, which gives an insight into the mechanism of directivity enhancement using three different ZIM metamaterials as the antenna's superstrates. It shows that double near-zero...
A new frequency and pattern reconfigurable antenna is proposed in this paper. Both frequency and pattern reconfigurations are effectively realized by using the microstrip double fed ports and four PIN diodes on the annular slot. At the low frequency band (1800MHz) and high frequency band(2400MHz), the antenna has four different patterns which are almost omnidirectional scanning and can be used to...
In this paper, we propose a novel ultra-wideband planar inverse-F antenna (PIFA) using periodic metal patches ground plane. By applying the capacitive compensation for the input impedance of the PIFA in higher frequencies, the proposed PIFA has a working frequency band from 2.3 GHz to 9.0 GHz. The effect of geometric parameters of the periodic metal patches and antenna height on antenna performance...
In this letter, a new compact antenna design with triple-sense circular polarization (CP) is presented for ultra-wideband (UWB) communication applications. The UWB property is obtained by utilizing a compact complementary planar monopole. In order to achieve multiband CP waves on base of UWB operation, the measurement has been taken such as etching a T-shaped slit in the antenna ground and adding...
A compact pattern reconfigurable quasi-Yagi antenna is presented. It consists of a driven element, which is simply realized by a microstrip monopole and only one parasitic element with four PIN diodes integrated on the arm. The effective electrical length of the parasitic element is controlled by changing the biasing voltages. This configuration allows two end-fire patterns with relatively high gain...
A new design of a dual-band shared-aperture antenna based on frequency selective surface (FSS) for synthetic aperture radar (SAR) applications is presented. Bow-tie patches are used as the radiating elements both at L-band and C-band. The centre frequency of the L-band antenna is 1.3 GHz and the centre frequency of the C-band antenna is 5.2 GHz. The simulated impedance bandwidth (S11 ≤ −10dB) of the...
A novel method of designing broadband microstrip antenna is proposed in this paper. By embedding a pair of Cross-shaped slots placed close to the non-radiating edges of a microstrip patch and adding an air layer between the substrate and the ground, the broadband character can be achieved. What's more, the formulas for calculating the two resonant frequencies have been experimentally deduced. Employing...
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