Tunable band‐notched ultra wideband planar monopole antenna

Jeong, Won-Seok; Kim, Dong‐Zo; Lim, Won‐Gyu; Yu, Jong‐Won

doi:10.1002/mop.24744

Cited by 13 publications

(10 citation statements)

References 6 publications

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“…This strategy has been accomplished successfully by integrating ON/OFF switch-type active elements, such as p-i-n diodes [8][9][10][11][12][13][14][15], micro-electromechanical system (MEMS) switches [16][17], shorting circuits [18], stepper motors [19], and optically controlled microwave switches (OCMSs) [20][21], into these UWB antennas. On the other hand, embedding continuously tunable voltage or current elements, for instance, varactors [22][23][24][25][26][27][28][29][30][31][32][33], into similar UWB antennas empowers one's ability to continuously tune their band-notch frequency windows.…”

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confidence: 99%

“…However, to the best of our knowledge, the UWB antennas with embedded varactors that have been reported to date have only achieved a single frequency-agile notch-band. In other words, at any one dynamical time, they only provide one notched-band [22][23][24][25][26][27][28][29][30][31][32][33]. They do not satisfy the cognitive radio requirements of being able to handle multiple band-notches at any one dynamical time.…”

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confidence: 99%

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Compact Planar Ultrawideband Antennas With Continuously Tunable, Independent Band-Notched Filters

Tang

Wang

Deng

et al. 2016

IEEE Trans. Antennas Propagat.

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A compact planar ultra-wideband (UWB) antenna with continuously tunable, independent band-notches for cognitive radio applications is presented. The antenna is fabricated using a copper cladded substrate. A radiating patch with an inverted rectangular T-slot is etched on the top side of the substrate. A straight rectangular strip with a complete gap is embedded into the T-slot. By placing a single varactor diode across this gap, a frequency-agile band-notch function below 5 GHz is realized. On the bottom side of substrate, a U-shaped parasitic element having an interdigitated-structure is placed beneath the radiating patch. The second narrow band-notch is created by inserting a second varactor diode into the gap on one leg of the parasitic element. It has a frequency agile performance above 5 GHz. The presence of the interdigitated structure suppresses higher-order resonant modes and enhances the tunability of the notched bandwidth. Because these antenna structures naturally block DC, a very small number of lumped elements are required. The experimental results, which are in good agreement with their simulated values, demonstrate that both band-notches can be independently controlled and the entire frequency-agile fractional bandwidth is as high as 74.5 %, demonstrating a very wide notched frequency-agile coverage. Index Terms-Band-notch filters, frequency agile, frequency tunable, planar antennas, UWB antennas I. INTRODUCTION ltra-wideband (UWB) technology has been widely applied in wireless sensor networks, biomedical and healthcare wireless systems, and some other in-house devices in radar detecting, locating, and communications [1]. These applications benefit from the unique features of low-power spectral density and consumption associated with UWB

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confidence: 99%

mentioning

confidence: 99%

Compact Planar Ultrawideband Antennas With Continuously Tunable, Independent Band-Notched Filters

Tang

Wang

Deng

et al. 2016

IEEE Trans. Antennas Propagat.

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“…A comparison between the proposed antenna with several UWB antennas in [5]- [10], [12] is presented in Table II. The comparison highlights some features of the proposed method: 1) In terms of physical dimensions, the proposed antenna is a planar structure, that is slightly larger than [8], [9] (among the tunable antennas) but smaller than those in [5]- [7]. However, it is important to note that the larger physical dimensions of the proposed antenna are not due to the loading resonators.…”

Section: B Uwb Antennas With Tunable Notch To Reject the Interferencmentioning

confidence: 96%

Reconfigurable and Tunable S-Shaped Split-Ring Resonators and Application in Band-Notched UWB Antennas

Horestani

Shaterian

Naqui

et al. 2016

IEEE Trans. Antennas Propagat.

142

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This paper proposes a compact reconfigurable (bandstop/bandpass) and frequency-tunable structure based on S-shaped split ring resonators (S-SRRs). It is known that an S-SRR coupled to a coplanar waveguide (CPW) provides a stopband in the transmission characteristic of the line. It is shown here that this behaviour of the S-SRR can be switched between fundamental resonance and second harmonic response by introduction of a PIN diode in the center segment of the S-SRR. Alternatively, if the S-SRR is loaded with a varactor diode instead of a switch, the frequency of the stopband can be continuously tuned from the S-SRRs fundamental resonance frequency to its second harmonic. Furthermore, it is shown that if a pair of shunt PIN diodes are introduced across the slots of the host CPW, the structure can be reconfigured from a bandstop to a bandpass structure. Thus, the proposed resonator structure can be used as the building block of reconfigurable (bandstop/bandpass) filters with tunable operating frequency. Finally, in order to demonstrate a practical application of the proposed structure, an ultrawideband antenna with a tunable band-notch is designed and experimentally validated.Index Terms-Reconfigurable antennas, S-shaped split ring resonator (S-SRR), ultrawideband antenna.

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“…In this regard, various tunable band-notched UWB antennas have been reported over the last decade [14][15][16][17][18][19][20][21][22][23]. These UWB antennas actually implement the strategy of PIN diodes, shorting circuits, microelectromechanical switches (MEMS), stepper motors, and optically controlled switching techniques.…”

Section: Related Workmentioning

confidence: 99%

Ompact CPW Fed Switchable Uwb Antenna as an Antenna Filter at Narrow-Frequency Bands

Nejatijahromi¹,

Naghshvarianjahromi²,

Rahman³

2018

PIER C

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Abstract-The aim of this paper is to present a compact coplanar waveguide (CPW) fed switchable UWB antenna as an antenna filter with adjustable notched frequency bands. Novel miniaturized tunable resonators are also presented to achieve notched bands. The antenna is made tunable in notched frequency bands without any modification in the basic structure. These stopbands are made tunable just by varying values of the capacitors according to our desired applications. The antenna structure is very compact having overall dimensions of 24 × 30.5 mm 2 with partial ground plane. The proposed small size, variable, low cost and low weight antenna with good propagation characteristics will pave the way for UWB wireless communication applications.

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Tunable band‐notched ultra wideband planar monopole antenna

Cited by 13 publications

References 6 publications

Compact Planar Ultrawideband Antennas With Continuously Tunable, Independent Band-Notched Filters

Compact Planar Ultrawideband Antennas With Continuously Tunable, Independent Band-Notched Filters

Reconfigurable and Tunable S-Shaped Split-Ring Resonators and Application in Band-Notched UWB Antennas

Ompact CPW Fed Switchable Uwb Antenna as an Antenna Filter at Narrow-Frequency Bands

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