A multiband antenna loaded with metamaterial and slots for GPS/WLAN/WiMAX applications

Abstract

A compact planar four band antenna loaded with metamaterial and slots for GPS, WLAN, and WiMAX applications, is presented in this letter. Initially, a dual‐band (2.9 and 5.9 GHz) antenna is designed by etching trapezoidal shaped slots in the radiating patch and rectangular shaped slots in the ground plane. In order to make the dual band antenna to operate at more number of bands, two identical metamaterial unit cells are introduced in the ground plane. The introduction of metamaterial creates additional resonance at 1.5 and 5.2 GHz, respectively. The proposed design has a dimension of 0.21 bold-italicλ0× 0.23 bold-italicλ0×0.01bold-italicλ0 at a lower frequency of 2.4 GHz, and operates at 1.5 (GPS), 2.4, 5.2 (WLAN), and 3.5 GHz (WiMAX) frequency bands, respectively. The proposed metamaterial negative permeability retrieval mechanism through waveguide medium is discussed in detail. The proposed design has measured S11 < −10 dB bandwidth of about 6.06% (1.6–1.7 GHz), 8.33% (2.3–2.5 GHz), 5.55% (3.5–3.71 GHz), and 5.94% (4.9–5.2 GHz), respectively. Good impedance matching, stable radiation characteristics with low cross‐polarization and an average gain of 2.25 dBi, are observed across the operational bandwidths, when the antenna is fabricated and tested.

CPW-Fed Compact Multiband Monopole Antenna for Wlan/Wimax/X-Band Application

“…With the development of multiple wireless communications standards, group of engineers focus their interests on how to design multiband antennas that can be integrated as many standards such as WLAN, WiMAX, and satellite communication as possible into a single wireless terminal device. In order to meet these requirements, various types of promising multiband antenna designs were studied in [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Planar printed monopole antennas with various structures in [1][2][3] have become popular candidates in multi-frequency applications for its advantages of low-cost, low-profile, and easy fabrication, whereas the antenna size is relatively large which is not suitable to be installed in mobile wireless terminals.…”

“…In [13], the antenna covers the entire WLAN/WiMAX band, but its low-frequency gain is low and does not support applications in other bands. Although the design of [14][15][16][17][18] supports up to four operating bands, the antenna structure is either complicated, so it is difficult to manufacture, or takes up unnecessary space, resulting in a large size. And these antennas cannot completely cover the required frequency bands.…”

A compact multiband band slot antenna for wireless applications

“…A test in planning such wireless systems is to configure smaller, ease, multiband and broadband antennas. For this, numerous promising double or multiband antennas outlines, such as, the microstrip‐line‐sustained antennas, Slots, fractals, metamaterials, , DGS etc.…”

Minitaurized Reconfigurable Multiband Antennas For GPS, UMTS, WiMAX & WLAN Wireless Applications

“…Area of the antenna occupies 50×45mm 2 space of PCB and two PIN diodes are used to convert multiband antenna into reconfigurable characteristics. Also, four bands antenna based on loaded metamaterial and slots targets wireless applications such as GPS, WLAN and WiMAX wireless system occupying volume of 0.21λ 0 ×0.23λ 0 ×0.01λ 0 with designed center frequency of 2.40GHz [2]. Hexaband antenna resonating at 1.30GHz, 1.75GHz, 33.35GHz, 6.50GHz and 7.60GHz respectively is reported in [3] which uses three asymmetric fork-shaped radiating elements including U-type radiator with slit.…”