A Planar Reconfigurable Radiation Pattern Dipole Antenna with Reflectors and Directors for Wireless Communication Applications

Trad, Imen Ben; Floc'H, Jean Marie; Rmili, Hatem; Drissi, M'Hamed; Choubani, Fethi

doi:10.1155/2014/593259

Cited by 12 publications

(9 citation statements)

References 6 publications

(8 reference statements)

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“…Tuning frequency of operation, polarization, and radiation pattern require complex circuits to expand the capability of these systems . The steering characteristic of the radiation pattern at a fixed operation frequency is also required and can be used to avoid noise source, improve security, and save energy by better directing the signal toward intended users as shown in Reference . Different switching technologies are used to obtain agility such as Micro‐Electro‐Mechanical‐Systems (MEMS) switches, varactor, and PIN diodes …”

Section: Introductionmentioning

confidence: 87%

Reconfigurable frequency and steerable beam of monopole antenna based on graphene pads

Elsheakh

2020

Int J RF Microw Comput Aided Eng

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This article presents a reconfigurable frequency and steerable beam monopole antenna based on tunable graphene pads operating in both 4G and 5G bands. The proposed antenna consists of printed CPW‐fed circular monopole shapes, with five rectangular strips added with a separation angle of 45°. These strips are connected to monopole by using graphene pads. The monopole antenna operates in the lower 5G band from 3 up to 7.8 GHz at −6 dB reflection coefficient. The antenna has an omni‐radiation pattern over the operating band without any applied bias voltage to the graphene pads. By applying the DC bias voltage, the rectangular strips are connected to the monopole and the designed antenna start to resonate from 1.8 to 8 GHz adding the 4G band frequencies. The steering of the proposed antenna beam started from −60° to 60° according to the bias of the connected graphene pads. The graphene pad exhibits a variable resistance realizing an almost short to an open circuit with and without voltage bias, respectively. The designed antenna is simulated using high frequency structure simulation (HFSS) Ansys ver. 19 and equivalent circuit model of the graphene. The antenna is fabricated using reduced graphene oxide (RGO) pads. Reflection coefficient and radiation pattern measurements as well as simulations are presented with a positive agreement between the results.

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Section: Introductionmentioning

confidence: 87%

Reconfigurable frequency and steerable beam of monopole antenna based on graphene pads

Elsheakh

2020

Int J RF Microw Comput Aided Eng

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“…The constant omnidirectional pattern at all working time leads to a waste of radiation power. Many reconfigurable antenna solutions have been studied [9][10][11][12][13][14][15][16][17][18][19][20]. Literature [9] proposed the H-shaped resonator structure controlled by the p-i-n diodes to reconfigure the pattern of the driven element.…”

Section: Introductionmentioning

confidence: 99%

“…Literature [11] puts forward a reconfigurable antenna array for some handheld terminals and MIMO applications, achieving a high gain. The antenna design in [12][13][14][15] has the horizontal azimuth-pattern-reconfigurable ability but limited states for the complex applications. Literature [16][17][18][19] develop a planar structure antenna with 9 states, not strictly in a horizontal azimuth pattern reconfigurable mode.…”

Section: Introductionmentioning

confidence: 99%

A Horizontal Azimuth Pattern-Reconfigurable Antenna Using Omnidirectional Microstrip Arrays for WLAN Application

Yang

et al. 2019

International Journal of Antennas and Propagation

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A horizontal azimuth pattern-reconfigurable antenna with configurable parasitic element arrays for WLAN applications is proposed in this paper. It consists of a control board, a central series-fed omnidirectional microstrip array, four configurable parasitic elements, a bottom conducting plate, and a top supporting plate. The omnidirectional microstrip array is adopted as an exciter, around which the four same parasitic element arrays are arranged at four corners. The p-i-n diodes as switches are placed between the parasitic element arrays and the conducting plate to control the fifteen radiation patterns of the proposed antenna. The parasitic element arrays are configured as reflectors or directors by switching the p-i-n diodes on or off. The bandwidth achieved ranges from 5.00 GHz to 5.27 GHz. A gain of 8.52 dBi is obtained when the antenna reaches the maximum gain in the H-plane at 5.2 GHz. Good agreements between the simulated and measured results were observed. The proposed parasitic structure which has the same structure with the driven element can enhance the horizontal azimuth gain of the antenna. Only 4 p-i-n diodes are used to produce up to 15 useful beam configurations with a gain range of 4.56-8.52 dBi at the horizontal azimuth.

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“…For further size reduction, these traditional wideband methods with single working state are limited. Considering the limited space for antenna design for mobile handsets, reconfigurable technology [8][9][10][11][12][13][14][15][16][17] is a good candidate. By using the reconfigurable technology, the antenna can work in several states to obtain wide bandwidth with a reduced size.…”

Section: Introductionmentioning

confidence: 99%

“…By using the reconfigurable technology, the antenna can work in several states to obtain wide bandwidth with a reduced size. Commonly, the reconfigurability is achieved by RF MEMS switches [8][9][10][11], PIN diodes [11][12][13][14][15], and varactors [16,17].…”

Section: Introductionmentioning

confidence: 99%

Small-Size Eight-Band Frequency Reconfigurable Antenna Loading a MEMS Switch for Mobile Handset Applications

Meng

2014

International Journal of Antennas and Propagation

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A planar small-size eight-band frequency reconfigurable antenna for LTE/WWAN mobile handset applications is proposed. The proposed antenna consists of a feeding strip and a coupled strip, with a total dimension of 10 × 29.5 mm2. Reconfigurability is realized by incorporating a one-pole four-throw RF switch, which is embedded in the coupled strip and changes the resonant modes for the lower band. By combining four different working modes, the proposed antenna successfully realize the eight-band operation, covering the operating bands of 700~787 MHz, 824~960 MHz, and 1710~2690 MHz. In addition, the simple DC bias circuit of the RF switch has little effect on the antenna performances, with no significant reduction in antenna efficiency and variations in the radiation patterns. The measured antenna efficiencies are 40%~50% and over 60% for the lower band and the upper band, respectively. Prototypes of the proposed frequency reconfigurable antenna incorporating the one-pole four-throw switch are fabricated and measured. The measured results including return losses and radiation characteristics are presented.

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A Planar Reconfigurable Radiation Pattern Dipole Antenna with Reflectors and Directors for Wireless Communication Applications

Cited by 12 publications

References 6 publications

Reconfigurable frequency and steerable beam of monopole antenna based on graphene pads

Reconfigurable frequency and steerable beam of monopole antenna based on graphene pads

A Horizontal Azimuth Pattern-Reconfigurable Antenna Using Omnidirectional Microstrip Arrays for WLAN Application

Small-Size Eight-Band Frequency Reconfigurable Antenna Loading a MEMS Switch for Mobile Handset Applications

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