The two-layered annular-ring microstrip antenna

Lee, K. F.; Dahele, J.S.

doi:10.1080/00207218608920860

Cited by 9 publications

(9 citation statements)

References 8 publications

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“…Figure 5 shows the performance of the proposed antenna at . It depicts that the proposed antenna is very sensitive to the feeding point location working on TM 11 mode whereas a single annular ring microstrip antenna is independent of feeding point location as reported by Lee and Dahele [1,13]. It is observed that displacement of feed point from inner periphery of the ring towards outer periphery causes considerable mismatching at lower resonance frequency and moderate mismatching at higher resonance frequency.…”

Section: Calculations and Discussion Of Resultssupporting

confidence: 55%

“…Although, in principle, the patch may be of any shape yet, in practice, only simple geometries like rectangular, square and circular structures are commonly employed. Like rectangular and circular patches, the annular ring microstrip antenna (ARMSA) has received the considerable attention of several investigators [1][2][3][4][5][6][7][8] due to its many salient features such as small size and broader bandwidth compared to other conventional patches. However, the main obstacle that restricts its wide applications in various fields is its inherent narrow bandwidth and low gain [1].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a number of bandwidth extension techniques have been suggested to achieve better performance of the ARMSA including use of thick substrate [2], use of air gap [3], use of superstrate [4], use of parasitic elements [5][6][7] and integration of active devices [8]. Among these techniques, the stacked parasitic configuration has been selected because it provides close spacing between the elements that is not realized in single layer parasitic elements, it does not excite surface waves that occur in thick dielectric substrate, and it does not generate high order modes that are generated for low dielectric substrate [7].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a Gap-Coupled Stacked Annular Ring Microstrip Antenna

Ansari¹,

Ram²,

Singh³

2008

PIER B

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Abstract-A theoretical analysis of a gap-coupled stacked annular ring microstrip antenna with superstrate is performed in order to obtain wider bandwidth operation. The effects of air gap, superstrate thickness and feeding point location on the antenna performance are analyzed in TM 11 mode using equivalent circuit concept. It is noted that the proposed antenna is very sensitive to the feeding point location in TM 11 mode while annular ring microstrip patch antenna is independent of feed point in that mode. The optimized proposed antenna shows an impedance bandwidth of 13.96% whereas the antenna without air-gap has 8.75% bandwidth and without superstrate it has bandwidth of 10.89%. The theoretical results are compared with simulated and experimental results.

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Section: Calculations and Discussion Of Resultssupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of a Gap-Coupled Stacked Annular Ring Microstrip Antenna

Ansari¹,

Ram²,

Singh³

2008

PIER B

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“…The performance of an annular ring microstrip antenna with two layers (substrate-air gap) was analysed by Lee &. Dehale (1986) [20]. The computer aided design (CAD) models for suspended and inverted MSA were studied by (Schellenberg 1995).…”

Section: Tunable Microstrip Antennasmentioning

confidence: 99%

Study of broadband circularly polarised microstrip antennas

Murugan

Rajamani²

2014

2014 International Conference on Science Engineering and Management Research (ICSEMR)

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In this paper, broadband and circular polarization techniques of Microstrip antenna (MSA) are studied. Microstrip antennas are suitable candidate for modern wireless communication. It possesses the advantages such as light weight, low cost and easy to fabricate, but they are inherence of bandwidth due to resonant nature. Several researchers attempted to overcome the above limitation. Also, MSA radiates naturally linearly polarized waves. Modern wireless communication requires circular polarization and wide bandwidth. In this context, several literature papers are available. The objective of the paper is to comprehensively study popular circular polarization and broadband techniques in MSA and sharing the knowledge to the new researchers in this field. Also, a design example is illustrated for broadband circularly polarized microstrip antenna

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“…The character of ARMSA has been studied in theory and practice [13][14][15][16]. In practical applications, its resonant frequency, input impedance, and impedance bandwidth are the keys to be concerned.…”

Section: Armsamentioning

confidence: 99%

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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The two-layered annular-ring microstrip antenna

Cited by 9 publications

References 8 publications

Analysis of a Gap-Coupled Stacked Annular Ring Microstrip Antenna

Analysis of a Gap-Coupled Stacked Annular Ring Microstrip Antenna

Study of broadband circularly polarised microstrip antennas

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

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