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A quad‐band dual‐polarized monopole antenna for GNSS/UMTS/WLAN/WiMAX applications
Author(s) -
Brar Rajveer Singh,
Saurav Kushmanda,
Sarkar Debdeep,
Srivastava Kumar Vaibhav
Publication year - 2018
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31008
Subject(s) - physics , monopole antenna , glonass , umts frequency bands , multi band device , j pole antenna , helical antenna , optics , ground plane , wimax , dipole antenna , circular polarization , radiation pattern , antenna (radio) , electrical engineering , global positioning system , microstrip , telecommunications , gnss applications , antenna efficiency , engineering , wireless
A quad‐band dual‐polarized monopole with asymmetrical microstrip feed line is proposed in this article. The proposed antenna exhibits a linearly polarized behavior in three operating bands for UMTS, WLAN 2.4 GHz, and WiMAX 3.5 GHz applications while a circularly polarized nature in the lowermost band for the GPS/GLONASS. The multiband operation is achieved because of λ/4 mode of resonances of three different monopole lengths and 3λ/4 mode of longer monopole. The 3λ/4 mode of larger monopole is controlled by using an L‐Shaped stub to make it useful for WiMAX application (3.5 GHz). The circular polarization for GPS (band‐L1, 1575 MHz) is achieved by using an L‐shaped slit with the ground plane which leads to generation of magnetic current orthogonal to the longest monopole current corresponding to the lowermost resonance frequency. The proposed antenna exhibits impedance bandwidths of 11.22%, 7.9%, 6.84%, and 4.26% at the resonant frequencies of 1.5, 2.02, 2.46, and 3.51 GHz, respectively. The axial ratio bandwidth corresponding to the GPS band is 2.5%. The proposed antenna has dual sense circular polarization (LHCP in θ = 0° and RHCP in θ = 180°) and bi‐directional radiation patterns at GPS/GLONASS band along with stable gain and good efficiency in all the operating bands.