A Design of Compact Planar Active-Integrated Inverted-F Antenna (AI-PIFA) for Mobile Handsets
A class-E power amplifier integrated with a rectangular ring planar inverted-F antenna (PIFA) is presented in this paper. The proposed PIFA is very compact and occupying less volume 16 × 10 × 5.5 mm3. The measured result shows that the proposed PIFA offers an impedance bandwidth of 250 MHz from 2.3–2.55 GHz, which is useful for LTE band 40 and WLAN (2.4–2.48 GHz). The maximum power-added efficiency (PAE) of class-E power amplifier is found to be 70% at 2.3 GHz. Further, the proposed PIFA is integrated with the class-E power amplifier to design an active-integrated antenna. The simulated results of the active-integrated antenna are presented. It is found that the gain of the active-integrated antenna system is increased from 2.4 dBi (passive) to 17.2 dBi (active).
KeywordsActive-integrated antenna (AIA) Class-E power amplifier (PA) Planar inverted-F antenna (PIFA)
- 1.Qin Y, Gao S, Sambell A (2006) Broadband high-efficiency circularly polarized active antenna and array for RF front-end application. IEEE Trans Microw Theory Tech 54(7), 2910–2916Google Scholar
- 2.Choi W, Cheon C, Kwon Y (2006) A V-band MMIC self oscillating mixer active integrated antenna using a push-pull patch antenna. In: IEEE MTT-S International Microwave Symposium Digest, pp 630–633Google Scholar
- 5.Sokal NO, Sokal AD (1975) Class-E a new class of high-efficiency tuned single-ended switching power amplifiers. IEEE J Solid-State Circuits SC-10:168–176Google Scholar
- 6.Raab FH (1977) Idealized operation of the class E tuned power amplifier. IEEE Trans Circuit Syst CAS-24:725–735Google Scholar
- 7.Mader TB, Popovic Z (1998) Switch mode high efficiency microwave power amplifiers in a free space power combiner array. IEEE J Trans Microw Tech 1391–1397Google Scholar