Polarization Characteristics of Multiband Loaded Microstrip Annular Ring Antennas

This research article explains the designing of triband multiple input multiple output (MIMO) hybrid radiator for diversified wireless applications. It comprises of two symmetrically placed hybrid radiators. These hybrid radiators are placed on a FR4 substrate with protruded ground plane to provide maximum isolation ||||S12<−20 normaldnormalB and improved diversity performance. Hybrid radiator consists of two C‐shaped printed lines and cylindrical dielectric resonator (CDR). A dual C‐shaped printed line behaves as a magnetic dipole and produces two different radiating modes in CDRA, that is, HE11δ and TE01δ mode. For confirming the simulated results, the prototype has been constructed and examined. Good agreement has been establish between simulated and experimental results. The proposed radiator is working over three frequency bands, that is, 1.86–2.60, 3.3–3.64, and 4.42–6.75 GHz. Different MIMO diversity performance parameters (ECC, DG, MEG, and CCL) are also examined and found to be in acceptable limit.

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“…Fundamental mode generates in annular ring shape printed line is TM 11. The resonant frequency of TM 11 mode is calculated using following formula:

f_{normalr, normalo normalu normalt normale normalr normalr normali normaln normalg} = \frac{c}{normalπ (|, 2 R_{1} + C_{1}) \sqrt{ɛ_{r, s}}}

f_{normalr, normali normaln normaln normale normalr normalr normali normaln normalg} = \frac{c}{normalπ (|, 2 R_{2} + C_{2}) \sqrt{ɛ_{r, s}}}

where R 1 and R 2 is the inner and outer radii of circle of large and small C‐shaped printed line. ‘ c ’ is the speed of light.…”

Section: Investigation Of Proposed Radiatormentioning

confidence: 99%

“…Fundamental mode generates in annular ring shape printed line is TM 11. The resonant frequency of TM 11 mode is calculated using following formula 11,12 :…”

Section: Reflection Coefficient Variation and E-field Analysismentioning

confidence: 99%

Triple‐band hybrid antenna with integral isolation mechanism for MIMO applications

Das

Sharma

Gangwar

2018

Micro & Optical Tech Letters

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“…For achieving system requirements, such as low‐cost, light‐weight, and compact size, annual ring antennas are more attractive than microstrip antennas because of increasing the excited current path [5]. According to such reasons, to minimize the radiator of annual ring antennas, various design methodologies, such as a meandered annual ring [6], a loaded ring [7], and metamaterial‐based ring [8], are recently reported. Miniaturized annul ring antennas with CP operation, however, may yield low antenna gain and poor radiation or antenna efficiency because of decreased effective apertures of the radiating element [6].…”

Section: Introductionmentioning

confidence: 99%

Circularly polarized annual ring antenna perturbed by asymmetrical defected ground structures for improved gain

Pyo

Lee

et al. 2011

Micro & Optical Tech Letters

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A novel perturbing methodology using asymmetrical defected ground structure (DGS) is proposed for a circularly polarized Figure 10 Measured and simulated VSWR for the modified antenna design of Figure 7(b). [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com](CP) annual ring antenna with improved antenna gain. By loading two fairs of half dumbbell-shaped DGS at four diagonal corners of the ring radiator, the orthogonally polarized modes are controlled. Simulated and measured results show that the proposed antenna demonstrates good CP radiations at the resonant frequency.

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“…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%

“…In [4][5][6][7][8], the technique of coupling feeding is used to improve the impedance matching. Loading gaps, slits, or stubs on the ring is another method to be involved [9], but the patch mainly works at linear polarization, and polarization rotation can be caused by the loading. However, the above approaches hardly provide wide impedance bandwidth because of the single resonant frequency.…”

Section: Introductionmentioning

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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Polarization Characteristics of Multiband Loaded Microstrip Annular Ring Antennas

Cited by 14 publications

References 10 publications

Triple‐band hybrid antenna with integral isolation mechanism for MIMO applications

Triple‐band hybrid antenna with integral isolation mechanism for MIMO applications

Circularly polarized annual ring antenna perturbed by asymmetrical defected ground structures for improved gain

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

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