Compact broadband gap‐coupled rectangular microstrip antennas

Ray, K. P.; Sevani, V.; Kakatkar, S. S.

doi:10.1002/mop.21976

Cited by 18 publications

(22 citation statements)

References 4 publications

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“…If the feed point is moved away from center towards the edge, then the loop shifts to right, i.e., towards high resistance region on the Smith Chart. By properly adjusting the gap and feed point, both broadband and dual frequency operation are possible for this configuration [3,4]. The feed point and gap are properly adjusted so that satisfactory dual frequency operation is obtained for this configuration with maximum bandwidth in two frequency bands.…”

Section: Configuration With Two Strips For Dual Band Operationmentioning

confidence: 99%

“…The resonance frequency of a RMSA primarily depends on it's length. Therefore, if a RMSA is divided into smaller elements along the width keeping the length same, these smaller elements radiate at almost same frequency as the original RMSA leading to increase in bandwidth [4]. Also, the number of resonances increases as the number of elements increases.…”

Section: Introductionmentioning

confidence: 99%

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Gap coupled rectangular microstrip antennas for dual and triple frequency operation

Ray

Sevani²,

Kulkarni³

2007

Micro & Optical Tech Letters

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noise. Figure 8 shows the measured phase noises of the freerunning, injection signal and injection-locked oscillator outputs in the divide-by-2 mode. The phase noise of free-running oscillator at 1 MHz offset is about Ϫ113 dBc/Hz. After external power injection at 0 dBm, the ILFD phase noise is about Ϫ134 dBc/Hz in the divide-by-2 mode. The phase noise of divide-by-2 ILFD is lower than that of the free-running oscillator by 21 dB. Table 1 shows the comparison between our presented injectionlocked divider and previously published reports. The FD has a comparable performance but with the smaller occupied chip area. CONCLUSIONA small die area 2.4-GHz FD employing the 3D helical inductors fabricated in the 0.18-m CMOS technology have been demonstrated, and the FD circuit uses the concept of inductor tapping to shift the parasitic drain-to-bulk junction capacitances of active switching MOSFET's away from paralleling with the varactors. The fixed capacitance that affects the tuning range is reduced; therefore, the locking range can be increased. Two 3D inductors have been used to reduce the chip occupied area and lower chip cost. The die area is 0.664 ϫ 0.731 mm 2 . The same concept of using single 3D inductor in FD can be used to reduce chip size of FD with an inductor. The implemented FD core consumes power of 2.6 mW at 1 V supply voltage, and the measured locked phase noise is Ϫ134 dBc/Hz at 1 MHz offset from the output oscillation frequency of 2.34 GHz. ACKNOWLEDGMENTThe authors thank the Staff of the CIC for the chip fabrication and technical supports. 2. M. Tiebout, A CMOS direct injection-locked oscillator topology as high-frequency low-power frequency divider, IEEE J Solid State ABSTRACT: A rectangular microstrip antenna is gradually divided into equal smaller elements along the width, and lengths of these smaller strips are varied to increase the separation between the resonances to obtain dual and triple frequency operation. Likewise, configurations consisting a maximum of five strips have been investigated. For configurations with two strips only dual frequency operation has been obtained, whereas for configurations with more than two strips both dual and triple frequency operation has been obtained. With increase in number of elements, the separation between different resonances is more and the radiation pattern is also similar in two frequency bands. Experiments have been performed and the results are in agreement with the simulations. Key words: gap coupled rectangular microstrip antenna; dual frequency rectangular microstrip antenna; triple frequency microstrip antennas; compact gap coupled microstrip antennasFigure 1 Gap coupled RMSA configurations obtained by splitting a single RMSA into smaller elements along the width; (a) single RMSA, Gap-coupled configuration with (b) two strips, (c) three strips, (d) four strips, and (e) five strips

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Section: Configuration With Two Strips For Dual Band Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gap coupled rectangular microstrip antennas for dual and triple frequency operation

Ray

Sevani²,

Kulkarni³

2007

Micro & Optical Tech Letters

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“…However, each methods would either increase the cost of the design or might deteriorate the radiation pattern and cause a considerable amount of decrease in the radiation efficiency. Another technique for performance improvement of microstrip antennas is stacking . It is possible to design an antenna with high gain and wide operation band by stacking a parasitic patch.…”

Section: Introductionmentioning

confidence: 99%

Design and realization of dual band stacked antenna via three‐dimensional printing technology

Belen

2019

Micro & Optical Tech Letters

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With the ever‐increasing demands for high‐performance wireless communication systems, the need of fast and low‐cost realization of antenna stages had also become more crucial for wireless communication industry. Herein, design and low‐cost realization of a three‐dimensional (3D) printed dual band Stacked Microstrip Patch Array (SMPA) antenna has been studied. A 3D electromagnetic‐based simulation model of the proposed SMPA antenna has been created in CST Microwave Studio. The antenna achieves a simulated gain level of almost 8.3 dBi at 5.2 and 10.4 GHz frequencies. Then, the antenna design with optimally selected parameters has been prototyped via the use of 3D printing technology. The prototyped antenna has a measured gain level of 7.2 dBi at the operation frequencies. Furthermore, the experimental results of the prototyped antenna have been compared with the simulated results. From the compared results, it can be concluded that not only the proposed antenna design has achieved high‐performance measures compared with counterpart designs in the literature but also it is possible to achieve an accurate, fast, and low‐cost realization via the use of 3D printing technology.

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“…Firstly These techniques, uses parasitic resonators which have nearly same dimensions as that of the original MSA, makes overall increase in size hence they are not suitable as array elements. Secondly distortion of radiation pattern at different frequencies in their operating band [5][6][7][8][9][10]. To overcome these problem, If a microstrip antenna(MSA) is splitted into smaller elements, which has nearly the same resonance frequency as that of the original MSA, then band width can be improved by suitably gap-coupling with these splitted elements.…”

Section: Introductionmentioning

confidence: 99%

A Novel Design and Development of Compact Gap Coupled Rectangular Microstrip Antenna for Wideband Applications

Chikatwar¹

2016

IJRET

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Compact broadband gap‐coupled rectangular microstrip antennas

Cited by 18 publications

References 4 publications

Gap coupled rectangular microstrip antennas for dual and triple frequency operation

Gap coupled rectangular microstrip antennas for dual and triple frequency operation

Design and realization of dual band stacked antenna via three‐dimensional printing technology

A Novel Design and Development of Compact Gap Coupled Rectangular Microstrip Antenna for Wideband Applications

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