Novel meandered planar inverted-F antenna for triple-frequency operation

Abstract

cations. To optimize the design parameters, the Sonnet (a method of moments (MoM) full-wave simulator) was used. Although the simulated results slightly disagree with the measured results due to the infinite-substrate presumption of the Sonnet simulator, the simulated results are still valuable and necessary. After the simulated optimum is obtained, the prototype is constructed by printing the patches on the 0.8-mm FR4 substrate. The reflection loss and radiation patterns are measured and discussed as follows.The simulated and measured results of reflection loss are shown in Figure 2. The resonant frequencies are indeed located at the EGSM and DCS bands. The measured bandwidths (determined by 1:2.5 VSWR) are about 120 and 124 MHz at the EGSM and DCS bands, respectively. The bandwidths are almost large enough to meet the bandwidth requirements of the EGSM/DCS systems, and are much better than those obtained in [2-4], especially at the EGSM band.Measured radiation patterns are presented in Figures 3 and 4 for the resonant frequencies at the EGSM and DCS bands, respectively. For both resonant frequencies, good omnidirectional radiation is observed. The maximum antenna gains for both the copolarization and cross-polarization patterns are estimated to be about 2.8 and 4.9 dBi across the EGSM and DCS bands, respectively. CONCLUSIONA novel NMFGA design has been proposed. A dual-band NMFGA prototype has been shown as an example. It has been demonstrated that the resonant modes at the EGSM and DCS bands can be excited. As the measured and simulated results show, not only the radiation characteristics but also the impedance-matching bandwidths are very attractive for EGSM/DCS dual-band applications.

Multiband Inverted-F Antenna With Independent Bands for Small and Slim Cellular Mobile Handsets

“…In recent years, there have been a number of PIFA designs with different configurations to achieve single and multiple operations by using different shapes of slots [2] - [11]. Truncated corner technique [12], meandered strips [13] and meandered shapes [14][15] have been used to create multiple band operations. Branch line slit has been used to achieve dual-band operations [16].…”

Optimal Design of Dualband CPW-Fed G-Shaped Monopole Antenna for Wlan Application

“…So far, many antenna designs with enhanced dual-or multiband operation capabilities have been developed and presented, which include the planar inverted-F antennas (PIFAs) [1][2][3], the chip antennas [4,5], the planar monopole antennas [6][7][8], and the coplanar waveguide (CPW)-fed antennas [9][10][11][12]. However, among these antennas, the CPW-fed monopole antennas have particularly received much more interest than others owing to their potential in providing various required radiation features of dualor multiband, broad bandwidth, simple structure of a single metallic layer, and easy integration with system circuit board.…”

Composite Compact Triple-Band Microstrip Antennas

“…In such cases, a patch antenna capable of operating in multi-band is highly desirable. The design of compact multiple band microstrip antennas for wireless applications has recently received much attention [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Several PIFA configurations have been suggested for GSM/DCS/WLAN, 900/1800/2450 MHz bands in recent publications.…”

“…Moreover, the structure uses two shorting pins. Branch line strip PIFA has also been proposed for triple band operation [14]. In that multilayer structure, two short-circuited branch strips are used.…”