An annular-ring microstrip antenna fed by a co-planar feed circuit for mobile satellite communication use

Ohmine, Hiroyuki; Sunahara, Yonehiko; Matsunaga, Makoto

doi:10.1109/8.585748

Cited by 30 publications

(17 citation statements)

References 16 publications

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“…The resonant frequency and the input impedance of the ARMSA are recorded in Table 1. Stacking a parasitic patch above the annular ring has been used to improve the impedance matching [10,11]. However, we have not seen the relative studies on the relationships between the parameters of the parasitic patch and the characters of SARMSA, especially, the impedance matching, impedance bandwidth, AR value, and AR bandwidth when the antenna works in circular polarization by a feeding network.…”

Section: Armsamentioning

confidence: 91%

“…At a fixed operating frequency, an annular-ring patch can realize more miniature dimensions than that of a circular patch, which is because the behavior of slotting on the patch extends the path of current flowing [12]. The CP operation of the annular ring also involves introducing perturbation segments [3,4] or adding feeding network [10,11]. However, the very large input impedance of ARMSA is an obstacle when an annular ring works in TM 11 and TM 21 modes [13].…”

Section: Introductionmentioning

confidence: 99%

“…The CP operation of the annular ring also involves introducing perturbation segments [3,4] or adding feeding network [10,11]. However, the very large input impedance of ARMSA is an obstacle when an annular ring works in TM 11 and TM 21 modes [13]. In the literatures, some techniques have been proposed to solve this problem.…”

Section: Introductionmentioning

confidence: 99%

“…However, the above approaches hardly provide wide impedance bandwidth because of the single resonant frequency. Stacking parasitic patch above the annular ring can greatly reduce the value of input impedance [10,11], and the bandwidth can be broadened obviously due to exciting two adjacent resonant frequencies. But in [10], the authors did not provide the relative parametric studies on the antenna performance, especially, the CP performance when the antenna works in circular polarization.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, annularring microstrip antenna (ARMSA) is another available structure to realize circular polarization [3][4][5][6][7][8][9][10][11]. It can be achieved by cutting a concentric circular slot on the circular radiating patch.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Parametric Studies on the Circularly Polarized Stacked Annular-Ring Microstrip Antenna

Chen¹,

Fu²,

Gong³

et al. 2010

PIER C

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Abstract-In this paper, we propose a circularly polarized (CP) stacked annular-ring microstrip antenna (SARMSA) with an integrated feeding network in the UHF RFID band. A circular parasitic patch is suspended above the annular ring to improve the impedance matching and bandwidth. Through the parametric studies on SARMSA, the CP characters of the entire antenna are well understood, and an optimized CP character is obtained. Prototypes are fabricated to confirm the theoretical results. The experimental results indicate the impedance bandwidth for S 11 < −10 dB is 870-967 MHz (10.6% at 915 MHz), and the 3 dB AR bandwidth is 893-948 MHz (6%). Meanwhile, the measured CP gain reaches 8.9 dBic at 915 MHz.

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Section: Armsamentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Parametric Studies on the Circularly Polarized Stacked Annular-Ring Microstrip Antenna

Chen¹,

Fu²,

Gong³

et al. 2010

PIER C

View full text Add to dashboard Cite

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A bent, crossed‐wire antenna with vertical parasitic elements: Formation of a circularly polarized conical beam

Hirose

Wada

2002

Electron. Comm. Jpn. Pt. I

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SUMMARYA novel crossed-wire antenna backed by a ground plane is proposed and analyzed using the method of moments. Two wires are crossed and fed in phase at the crossing point to radiate a conical beam. To make the conical beam circularly polarized, the crossed wires are bent and four vertical parasitic elements (PE) are added. The antenna is characterized by its simple feed and CP radiation at low elevation angles. First, the effects of the PE location on the radiation characteristics are investigated for crossed wires of a half wavelength. When the PE location is appropriately chosen, the antenna radiates a CP conical beam. Next, attention is paid to CP radiation in a wide range of elevation angle. Calculations show that the angle range where the axial ratio is less than 3 dB increases to 65° from 15° for a changed crossed-wire length. The maximum CP radiation is obtained at an elevation angle of 35°. Finally, the frequency characteristics are studied and the bandwidth for a 3-dB axial ratio criterion is found to be 8%.

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A conical‐pattern annular‐ring microstrip antenna with a photonic bandgap ground plane

Lin

Wong

2001

Micro & Optical Tech Letters

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A probe‐fed annular‐ring microstrip antenna with a photonic bandgap (PBG) ground plane operating in the higher order mode of TM21 for conical‐pattern radiation is experimentally demonstrated. The antenna studied is printed on a thin FR4 substrate (relative permittivity 4.4) and, owing to the PBG ground plane used, significant improvements in the antenna performances are observed. The obtained impedance bandwidth is doubled, and the antenna gain is enhanced by about 7 dBi. Details of the experimental results are presented and discussed. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 159–161, 2001.

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An annular-ring microstrip antenna fed by a co-planar feed circuit for mobile satellite communication use

Cited by 30 publications

References 16 publications

Parametric Studies on the Circularly Polarized Stacked Annular-Ring Microstrip Antenna

Parametric Studies on the Circularly Polarized Stacked Annular-Ring Microstrip Antenna

A bent, crossed‐wire antenna with vertical parasitic elements: Formation of a circularly polarized conical beam

A conical‐pattern annular‐ring microstrip antenna with a photonic bandgap ground plane

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