A Low-Profile Linearly Polarized 3D PIFA for Handheld GPS Terminals

Abstract

A 3D planar inverted F-antenna (PIFA) is proposed for a Global Positioning System (GPS) receiver. The antenna is designed to be integrated in a portable device and must meet compact size requirements. The 3D PIFA consists of a single metal sheet properly cut and bent in order to minimize costs for realization, materials and series production. The linearly polarized antenna exhibits good impedance matching performance, wide beam radiation patterns and a relatively high gain, which allow the reception from a wide angle toward the satellite constellation. An antenna prototype has been embedded in a commercial GPS receiver and an experimental measurement campaign has been carried out to evaluate the most important performance parameters. Measurements have been performed out by collecting time sweeps signal samples along urban and suburban routes. Time to first fix, carrier to noise ratio distribution and horizontal dilution of precision have been calculated; these parameters are shown and discussed. Comparisons with respect to some reference circularly polarized antennas (a nearly square patch and a quadrifilar helix antenna) and to a simpler inverted-F antenna printed on the receiver PCB have been performed and are shown in the pape

Dual-Band Frequency Reconfigurable Small Eighth-Mode Substrate-Integrated Waveguide Antenna

“…GPS는 위성통신을 기반으로 이루 어지기 때문에 CP(Circular Polarization) 안테나를 사용하 게 된다 [10], [11] . 하지만 공간상의 제약이 있는 기기에서는 LP(Linear Polarization)를 갖는 안테나도 GPS 안테나로써 사용이 가능하고 [12], [13] , 반사 성분이 많은 도시 환경에서 는 CP와 LP의 차이가 크기 않다는 논문 결과도 발표되었 다 [14] . [16] .…”

A very small chip antenna supporting multiple radio protocols

“…Bluetooth applications in the 2.4 GHz band have become a must in almost all of the mobile devices. At the same time, the function of GPS concurrently supported has gradually become a requirement to support location guidance and emergency assistance [4]- [5]. While the above bands already exist in mobile phones, WiMax technology of IEEE 802.16 has come into play for long distance wireless access for both mobile phones and tablets [6]- [7].…”

Circularly Polarized Chip Antenna Design for GPS Reception on Handsets

“…However, their weights and protruded structures may not fit to thin casing designs of contemporary slender terminals. A planar PIFA is proposed in [2] for a dedicated handheld navigation device. However, its antenna volume, which is 40 25 10 mm , is still too bulky for multifunctional handsets.…”