A quad-band inverted-F antenna for PDA-phone applications is presented. The proposed antenna measures only 46 Â 12 Â 0.8 mm. It has an inverted-L element combined with a meander-line branch to excite two resonant modes. By using a matching element, the bandwidth can be broadened to cover GSM850/GSM900/DCS/PCS bands. Simulation was performed by HFSS to optimally design the antenna, and a practical structure was fabricated to verify the simulation results. The antenna parameters were measured and are presented to validate the proposed antenna.

Triple‐band compact monopole antenna with SS‐CML units loading is proposed in this article. On the basis of mathematical analysis to equal electrical length SS‐CML unit, extended analysis to the unequal case is done. The design method is presented by CRLH‐TL theory. The multifrequency performance of the antenna by changing the current phase through the monopole is achieved. Simulated results show that the antenna can operate at three separate frequency bands of 1.36–1.69 GHz 2.17–2.59 GHz, and 3.38–3.83 GHz, with return loss less than −10 dB. Measurements and EM simulations are in good agreement with the theoretical analysis. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:152–158, 2014

A new wideband magneto-electric dipole antenna using coplanar waveguide (CPW) structure is proposed in this paper. The proposed antenna consists of a pair of horizontal triangular patches and two vertically oriented L-shaped strips. By introducing triangular patches working as an electric dipole, the antenna can operate in a wide band. With the use of L-shaped strips equivalent to a magnetic dipole, the antenna is low in profile. A microstrip feed line is located between the two L-shaped strips to form a coplanar waveguide structure and excite the antenna. By carefully adjusting the gap between the feed line and the strips, the impedance bandwidth can be improved largely. A parametric study is performed to provide information for designing and optimizing such an antenna. A prototype is fabricated and measured. The simulated and measured results show that the impedance bandwidth for SWR less than 2 of the proposed antenna is 58. . Due to the complementary nature of the antenna, the proposed antenna has a unidirectional radiation pattern with low-polarization and low back-lobe radiation over the whole operating band. Furthermore, the gain of the antenna is stable across the entire bandwidth.