Small Inverted-U Loop Antenna for Gps Application

Lin, Yen-Ting; Chen, W.-S.; Lee, B.-Y.; Lin, Shun‐Yun; Wu, Hong-Wen

doi:10.1163/156939310791586133

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…Loop antennas are commonly used for mobile systems [19][20][21][22][23]. At LF and HF bands, a physically large loop is still a very small electrically fraction compared to the operating wave-length.…”

Section: Antenna Design and Structurementioning

confidence: 99%

Compact Loop Antenna for Near-Field and Far-Field Uhf Rfid Applications

Lai¹,

Xie²,

Cen³

2013

PIER C

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A novel type of radio frequency identification (RFID) reader antenna is proposed for mobile ultra-high frequency (UHF) RFID device. By folded-dipole loop structure with parasitic element, a small antenna size of 31 * 31 * 1.6 mm 3 is achieved. The antenna with different parasitic element size can work on different UHF RFID bands. The antenna prototype is fabricated and the measured bandwidth is around 13.5 MHz (915.5-929 MHz), which covers the China RFID Band (920-925 MHz). The measured reading distance achieves 65 mm with the near-field RFID tag and 1.17 m with the far-field tag. The measurement agrees well with simulated result and shows that antenna is desirable for both near-field and far-field UHF RFID applications.

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Section: Antenna Design and Structurementioning

confidence: 99%

Compact Loop Antenna for Near-Field and Far-Field Uhf Rfid Applications

Lai¹,

Xie²,

Cen³

2013

PIER C

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“…In principle, the antennas for CP wave have to excite two perpendicular electric fields with equal magnitudes. Many types of antennas, such as loop [5,6], fractal [7], slot [8,9], and patch [10][11][12] for CP applications have been proposed previously. In [5], an L-shaped slot is embedded in the ground plane for CP characteristics and improving its impedance.…”

Section: Introductionmentioning

confidence: 99%

“…In [5], an L-shaped slot is embedded in the ground plane for CP characteristics and improving its impedance. The CP radiation proposed in [6] is achieved by two traveling wave modes. The Koch fractal antenna with corner-truncated structure used in [7] achieves the right-handed circular polarization (RHCP) radiation.…”

Section: Introductionmentioning

confidence: 99%

A Corner-Fed Square Ring Antenna With an L-Shaped Slot on Ground Plane for GPS Application

Lee

Chen²,

Su³

et al. 2013

PIER C

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Abstract-This paper proposes a square ring patch antenna for GPS L 1 band application. The square ring patch located on the center of an FR4 substrate was truncated a square to guide two resonant modes. The dimensions of the truncated square located on the center of the patch controls the antenna's frequency band. Larger truncated square creates longer resonant path that decreases the resonant band. To achieve the CP radiation patterns, the corner-fed method and a truncated L-shaped slot on the ground plane are applied. After the size of the truncated L-shaped slot is optimized, the currents of E θ and E ϕ are around 90 • shifts that make the antenna's AR lower than 3 dB. By switching the positions of the feed point and the L-shaped slot, both RHCP and LHCP can be obtained individually. Beside the CP operation, the proposed design also has advantages of planar structure, simple design, low cost, and good performances.

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A Planar WWAN/LTE Antenna for Portable Devices

Chen

Jhang

2013

Antennas Wirel. Propag. Lett.

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Small Inverted-U Loop Antenna for Gps Application

Cited by 4 publications

References 7 publications

Compact Loop Antenna for Near-Field and Far-Field Uhf Rfid Applications

Compact Loop Antenna for Near-Field and Far-Field Uhf Rfid Applications

A Corner-Fed Square Ring Antenna With an L-Shaped Slot on Ground Plane for GPS Application

A Planar WWAN/LTE Antenna for Portable Devices

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