Switchable Quad-Band Antennas for Cognitive Radio Base Station Applications

Wu, Tai-Hsien; Li, Rong Lin; Eom, Soon-Young; Myoung, Seong-Sik; Lim, Kyutae; Laskar, J.; Jeon, Soon Ik; Tentzeris, Manos M.

doi:10.1109/tap.2010.2044472

Cited by 86 publications

(41 citation statements)

References 18 publications

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“…The simulated AR characteristics in Figure 9 The proposed planar CP broadband antenna is a promising candidate for chipless RFID [15] and cognitive radio systems [16].…”

Section: Resultsmentioning

confidence: 99%

Bandwidth Enhancement of Circularly Polarized Square Slot Antenna

Joseph¹,

Fukusako²

2011

PIER B

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Abstract-Bandwidth enhancement technique of circularly polarized square slot antenna is presented in this paper. A square slot antenna with the components of L-probe separated could achieve an axial ratio (AR) bandwidth of 33.84%. Placing Stubs in the slot by studying the electric field behaviour could enhance the AR bandwidth by around 10%. Creating an L-shaped slot on the ground plane, where the electric field rotates in the desired clockwise direction, can further enhance the bandwidth by 7%. A < −10 dB S 11 bandwidth of 46.15% and < 3 dB AR bandwidth of 50.35% could be achieved with the present design. Unidirectional patters are obtained by having a cavity at the wide slot of the antenna and shows a measured bandwidth of 41.79% in S 11 and 44.97% in AR. Both antennas show a cross polarization discrimination of more than 15 dB on a wide azimuth range. The measured results well comply with the simulated results.

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“…The simulated AR characteristics in Figure 9 The proposed planar CP broadband antenna is a promising candidate for chipless RFID [15] and cognitive radio systems [16].…”

Section: Resultsmentioning

confidence: 99%

Bandwidth Enhancement of Circularly Polarized Square Slot Antenna

Joseph¹,

Fukusako²

2011

PIER B

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“…Simulated and measured S 11 is better than -10 dB for 1-3 GHz and 5-7 GHz. Figure 13 shows that E field redistributes under UWB antenna and stub S 6 . The observed value of gain is 2.4 dB at 5 GHz as shown in Fig.…”

Section: Spectrum Sensing Mode/ Wb Frequency Reconfigurable Modementioning

confidence: 99%

“…Such antenna has a spectrum-sensing antenna for detecting the spectrum condition and reconfigurable antenna for communicating purpose [1], [2]. Many antenna designs have been already reported in the literatures, which are compatible with CR [3][4][5][6]. Further to decrease the system size, these two antennas must be optimally design on a single substrate.…”

Section: Introductionmentioning

confidence: 99%

An Integrated Frequency Reconfigurable Antenna for Cognitive Radio Application

Sharma¹,

Tripathi²

2017

RADIOENGINEERING

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“…In this paper we are proposing a novel compact frequencyreconfigurable monopole antenna with various switchable states. Most of frequency-reconfigurable antennas are antennas only capable of switching between different narrowband modes [16]- [17]. In [16], a switchable quad-band antenna by using a microelectromechanical systems (MEMS) switch has been proposed.…”

Section: Introductionmentioning

confidence: 99%

“…Most of frequency-reconfigurable antennas are antennas only capable of switching between different narrowband modes [16]- [17]. In [16], a switchable quad-band antenna by using a microelectromechanical systems (MEMS) switch has been proposed. By controlling the states of switches, the patch antenna in [17] can operate in four different frequencies.…”

Section: Introductionmentioning

confidence: 99%

A Frequency Reconfigurable UWB Monopole Antenna with Slotted Ground Structure

Rajan¹,

Elias²

2017

ijecs

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In this modern world, there has been a significant drive to increase the functional density of consumer devices, especially hand-held electronics. In order to meet this challenge all the components need to be miniaturized. Most commonly used component in modern electronics is an antenna. The size of an antenna is directly related to its operational frequency. Frequency tunable miniaturized antennas are required for next generation electronics. In the existing system a multi-layered metamaterial-inspired antenna with a pixel grid loading structure is explained. In order to produce desired performance appropriate pixel configuration need to be selected. Simulations show that the antenna can be tuned over a wide frequency range by appropriate choice of pixel states. Here we are proposing a novel compact frequency-reconfigurable monopole antenna with various switchable states. Using a switchable slotted structure on the ground plane, the antenna can achieve frequency configuration capability. The proposed antenna has a combined UWB and narrowband functionality, has a good potential for use in cognitive radio. The simulations are done using HFSS (High Frequency Structure Simulator) software.

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Switchable Quad-Band Antennas for Cognitive Radio Base Station Applications

Cited by 86 publications

References 18 publications

Bandwidth Enhancement of Circularly Polarized Square Slot Antenna

Bandwidth Enhancement of Circularly Polarized Square Slot Antenna

An Integrated Frequency Reconfigurable Antenna for Cognitive Radio Application

A Frequency Reconfigurable UWB Monopole Antenna with Slotted Ground Structure

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