Frequency reconfigurable antenna for VHF/UHF digital TV reception on portable devices using switching matching networks

Liao, Wen‐Jiao; Chou, Shin-Hui; Chen, Yi-Ane; Lee, Yumin; Ho, Min-Chen; Po-Yi, Wu

doi:10.1002/mop.30819

Cited by 9 publications

(2 citation statements)

References 15 publications

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“…In particular, a frequency reconfigurable antenna is beneficial for various applications. Frequency reconfigurability can be achieved by using electrical switches [ 9 , 10 , 11 ], varactor diodes [ 12 , 13 , 14 , 15 ], p-i-n diodes [ 16 , 17 , 18 , 19 ], and radio-frequency micro-electromechanical systems (RF-MEMS) [ 20 , 21 , 22 ]. The electric switching technique has the advantage of lower voltage requirements, whereas RF-MEMS provide higher switching time.…”

Section: Introductionmentioning

confidence: 99%

A Conformal Frequency Reconfigurable Antenna with Multiband and Wideband Characteristics

Hussain

Ghaffar

Naqvi

et al. 2022

Sensors

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A compact flexible multi-frequency antenna for smart portable and flexible devices is presented. The antenna consists of a coplanar waveguide-fed slotted circular patch connected to a rectangular secondary resonator (stub). A thin low-loss substrate is used for flexibility, and a rectangular stub in the feedline is deployed to attain wide operational bandwidth. A rectangular slot is etched in the middle of the circular patch, and a p-i-n diode is placed at its center. The frequency reconfigurability is achieved through switching the diode that distributes the current by changing the antenna’s electrical length. For the ON state, the antenna operates in the UWB region for −10 dB impedance bandwidth from 2.76 to 8.21 GHz. For the OFF state of the diode, the antenna operates at the ISM band (2.45/5.8 GHz), WLAN band (5.2 GHz), and lower X-band (8 GHz) with a minimum gain of 2.49 dBi and a maximum gain of 5.8 dBi at the 8 GHz band. Moreover, the antenna retains its performance in various bending conditions. The proposed antenna is suitable for modern miniaturized wireless electronic devices such as wearables, health monitoring sensors, mobile Internet devices, and laptops that operate at multiple frequency bands.

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Section: Introductionmentioning

confidence: 99%

A Conformal Frequency Reconfigurable Antenna with Multiband and Wideband Characteristics

Hussain

Ghaffar

Naqvi

et al. 2022

Sensors

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show abstract

“…In general, there are abundant studies on reconfigurable antennas in the UHF band that use active components [6][7][8][9][10]. A switching matching network was integrated with the RF transceiver to adjust the operating frequency reported in [11]. Using an SP4T component, the four matching networks could be used to connect the antenna resonator to the RF transceiver.…”

Section: Introductionmentioning

confidence: 99%

Multiband Frequency Tuneable Antennas for Selection Combining Strategy in White Space Applications

Trinh

Ferrero

2022

Applied Sciences

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This article presents a reconfigurable antenna using digitally tuneable capacitors (DTCs). Mounted on a 120 × 200 mm2 ground plane, the radiating element has very compact dimensions of 0.06λg × 0.016λg × 0.0016λg (with λg being the wavelength at 585 MHz). The proposed structure could be operated in the white-space frequency band from 470 to 700 MHz. The antenna system is composed of two radiated elements that are placed at the corner of the board. The active components were soldered onto the antennas and controlled by an embedded microcontroller via the I2C interface. Antenna impedances were simulated and evaluated by measurement with an impedance-matching bandwidth of 39.32% (470–700 MHz) for an S11 less than −6 dB. Furthermore, the numerical results show a realized maximal gain ranging from −2.2 dBi at 470 MHz to 1.87 dBi at 700 MHz. Lastly, the diversity gains based on the radiation pattern of two resonators were calculated. The results show envelope correlation coefficient (ECC) values lower than 0.5 for the different configurations.

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Substrate integrated waveguide (SIW) cavity-backed slot antenna with monopole-like radiation for vehicular communications

2022

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Frequency reconfigurable antenna for VHF/UHF digital TV reception on portable devices using switching matching networks

Cited by 9 publications

References 15 publications

A Conformal Frequency Reconfigurable Antenna with Multiband and Wideband Characteristics

A Conformal Frequency Reconfigurable Antenna with Multiband and Wideband Characteristics

Multiband Frequency Tuneable Antennas for Selection Combining Strategy in White Space Applications

Substrate integrated waveguide (SIW) cavity-backed slot antenna with monopole-like radiation for vehicular communications

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