A novel dual‐band printed inverted‐F antenna

Abstract

of the printed PIFA show no special distinction when compared with those of the hybrid PIFA shown here. Thus, the radiation patterns of the printed PIFA are not shown for brevity. Figure 10 presents the measured antenna gain and simulated radiation efficiency over the lower and upper bands of the hybrid PIFA studied in Figure 3. For the lower band from 1.88 to 2.75 GHz, the antenna gain is varied in the range of 1.3-2.5 dBi, while the radiation efficiency is about 85% over the band. As for the upper band from 4.89 to 5.90 GHz, the antenna gain is varied from about 4.1 to 5.5 dBi, and the radiation efficiency is also about 85% over the band. The corresponding results of the printed PIFA studied in Figure 4 are shown in Figure 11. It can be seen that the obtained antenna gain and radiation efficiency are about the same as those shown in Figure 10. That is, similar radiation characteristics of the hybrid and printed PIFAs studied here are obtained. CONCLUSIONTwo kinds of promising PIFAs (hybrid PIFA and printed PIFA) for application in a USB dongle have been proposed, fabricated, and tested. Both the hybrid and printed PIFAs occupy a compact volume and can easily be embedded inside the casing of the general USB dongle as internal antennas. In addition, both the two PIFAs can provide two wide operating bands for covering UMTS/ WLAN/WiMAX multi-network operation. Easy adjustment of the two wide operating bands of the proposed hybrid and printed PIFAs has also been obtained. The two PIFAs also show good radiation characteristics over their two wide operating bands. ACKNOWLEDGMENT

Multiband multi-antenna system for MIMO wlan box

“…The first step was to design an initial single IFA (Inverted-F Antenna) sized to operate in the low [2.41-2.48GHz] and high [5.1-5.9 GHz] WLAN bands [7]. This IFA consists of two branches for which the longest operates in the lower band, and the shortest in the higher band.…”

Fractal monopole‐like antenna with series Hilbert‐curves for WLAN dual‐band and circular polarization applications

“…For implementations, configurations such as printed dipole [1], F-shaped monopole [3], stack inverted-F monopole [2,5,18], double-T monopole [6,7], rectangular slot [8], reconfigurable geometry [9], double S-shaped monopole [10], triangular slot [11], G-shaped monopole [12], C-shaped monopole [13], double ring slot [14], hock-shaped monopole [21], rectangular dielectric resonator [22], shorted parasitic patches [15], double slot-ring [17], loop monopole [18], slotted-patch monopole [19], ring monopole [20], and circular monopole [23] etc., have been developed for WLAN dual-band applications. In which, the stack inverted-F antenna usually be applied for the PCMCIA network card because of the advantage of low profile, low cost, good 50 ⍀ matching, capable integration with circuits and easy mounted [2].…”

“…In which, the stack inverted-F antenna usually be applied for the PCMCIA network card because of the advantage of low profile, low cost, good 50 ⍀ matching, capable integration with circuits and easy mounted [2]. And, the modified stack inverted-F antenna was proposed to deliver the properties of diversity and improvements of frequency responses, isolation and radiation gain [5,16].…”

Design and Study of Uniplanar Coupled Inverted-L Antenna for Single-/Dual-Band Operation

“…Two miniaturized design, one for spiral-shaped radiator of inductive coupling and the other for radiator of capacitive coupling [16] were proposed. Furthermore, extending PIFA design has been explored to achieve different specifications, such as a shunted F-L radiator with wide-high band [17], a stacked inverted-F radiator with wide-low band [18], and a stacked inverted-FL radiator with grounded inverted-L strip that can reduce the antenna size effectively [19]. A trade-off design was considered for small size and radiation efficiency [20].…”