A novel dual-band frequency tunable slot antenna with constant frequency ratio

Yang, Jie; Choi, Wai‐Wa; Tam, Kam‐Weng

doi:10.1109/apmc.2015.7413002

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…To overcome the bandwidth limitation, the operating frequencies can be smoothly and continually tuned using various techniques. The antennas can be electronically tuned [1][2][3][4][5][6][7][8][9], dynamically tuned [10], or magnetically tuned [11]. On the other hand, the antenna miniaturisation can be obtained by loading inductors and capacitors [12], using shorting pins or walls [13], employing metamaterial structures [14], or a combination of them.…”

Section: Introductionmentioning

confidence: 99%

“…Several electronically tunable dual-band antennas using varactor diodes have been reported in the literature. The two frequency bands can be independently tuned [1][2][3][4], simultaneously tuned [5][6][7], or just a band is tuned while the other band is fixed [8,9]. For instance, a compact dual-band antenna for GSM/DCS-1800 applications was introduced in [2].…”

Section: Introductionmentioning

confidence: 99%

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Compact highly integrated wide‐tunable unidirectional dual‐band patch antenna for wireless applications

Boukarkar

Lin

Jiang

et al. 2017

IET Microwaves, Antennas & Propagation

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A compact dual‐band patch antenna with independent tuning of both frequencies is introduced. The frequency agility is achieved by inserting two varactor diodes into the radiating patch, while the antenna miniaturisation is realised by shorting one patch edge using metallised vias. Simulated and measured results are in good agreement. Measurements reveal that the two operating bands can be tuned separately without any frequency shifting and with high stability and similar unidirectional radiation patterns during the tuning process. The measured tunable ranges of the lower and upper bands are 27.95% (from 2.4 to 3.18 GHz) and 28.27% (from 4.1 to 5.45 GHz), with measured peak gains and efficiencies of [3.23 dBi, 65%] and [3.42 dBi, 62%], respectively. The antenna presents comparatively wide tuning ranges with similar unidirectional radiation patterns, has a miniaturised size, and uses a simple direct current bias circuit. Thus, it can be easily integrated and used in different wireless systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compact highly integrated wide‐tunable unidirectional dual‐band patch antenna for wireless applications

Boukarkar

Lin

Jiang

et al. 2017

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

show abstract

Alternating Current Sensing Slot Antenna

2021

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Dual operations of AC current sensing and Bluetooth transmission using a reconfigurable slot antenna are described here. The novel current sensing setup comprises of a tunable antenna connected to a current transformer and AC/DC converter to create a smart AC current sensing mechanism. The tunable antenna consists of a double-layer slot antenna on a thin, flexible substrate with a tuning circuit consisting of capacitive-coupled biasing tracks on the backside. Capacitive coupling isolates circuits at DC while providing connectivity at radio frequency (RF). Tracks act as the capacitors for the tuning biasing circuit. A double-sided copper clad Mylar substrate is etched to produce the slot antenna on one side and the biasing circuit using inexpensive Varactor diodes on the other side. The antenna tunes over a wide frequency range of approximately 2:1. The antenna is able to sense currents by providing a frequency response when connected to the sensing system. The current sensing antenna can also detect the operational or non-operational states of the appliances and devices. This low-cost setup of antenna on a flexible substrate can assist in detecting the power and current monitoring in household electrical devices providing an energy-efficient solution while also operating as a transmitter via Bluetooth. The measured reflection coefficients and radiation patterns are in a good agreement with the simulated results and noticeably clear sensing of current is achieved.

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A novel dual-band frequency tunable slot antenna with constant frequency ratio

Cited by 2 publications

References 6 publications

Compact highly integrated wide‐tunable unidirectional dual‐band patch antenna for wireless applications

Compact highly integrated wide‐tunable unidirectional dual‐band patch antenna for wireless applications

Alternating Current Sensing Slot Antenna

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