Magnetic steerable ferrite patch antenna array

How, H.; Guan, Dexing; Vittoria, C.

doi:10.1109/20.334145

Cited by 17 publications

(8 citation statements)

References 7 publications

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“…The diameter of the circular patches is 0.48 cm, and the dimensions of the feeder lines are shown in Figure 10.8(a). Â: without a magnetic field; ,: with a magnetic field perpendicular to the feeder line; B: with a magnetic field parallel to the feeder line (900 Oe) (How, Fang, Guan, & Vittoria, 1994 (Pozar, 1992). The magnetic field is applied either along the x or the y axis.…”

Section: Effects Of Ferrite Substrate On Antenna Tunable Radiation Beamsmentioning

confidence: 99%

“…The maximum radiation intensity is at an angle q ¼ 47 for the radiation without an applied biasing field (Â dotted in the figure). A tunable radiation beam can be obtained by varying the magnitude and direction of the applied biasing magnetic field (How et al, 1994). Therefore, the radiation patterns of the ferrite patch antenna array depend on the biasing of the ferrite substrate.…”

Section: Effects Of Ferrite Substrate On Antenna Tunable Radiation Beamsmentioning

confidence: 99%

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Magnetoelectric composites for miniature antennas

Yang

Sun

2015

Composite Magnetoelectrics

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Section: Effects Of Ferrite Substrate On Antenna Tunable Radiation Beamsmentioning

confidence: 99%

Section: Effects Of Ferrite Substrate On Antenna Tunable Radiation Beamsmentioning

confidence: 99%

Magnetoelectric composites for miniature antennas

Yang

Sun

2015

Composite Magnetoelectrics

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“…The new method will reduce the number of phase shifters from ( ) to ( ) where is the number of columns and is the number of rows in a two-dimensional (2-D) planar phased array [8]. Manuscript Beam steering methods using a ferrite plate have been developed for a low cost system, but it requires very high voltage up to several kV [5], [8], [9]. The ferrite plate phase shifter of [8] requires impedance matching transformers, a polarization rotator for 2-D array, large size lens, power consumption of 0.5 W, forced air cooling, etc.…”

Section: Introductionmentioning

confidence: 99%

A low-cost 8 to 26.5 GHz phased array antenna using a piezoelectric transducer controlled phase shifter

Yun

Chang

2001

IEEE Trans. Antennas Propagat.

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A new phased array antenna of wide bandwidth and good beam scanning angle has been developed using a low cost multiline phase shifter controlled by a piezoelectric transducer (PET) and a stripline fed Vivaldi antenna array. The multiline progressive PET phase shifter has a low perturbation loss of less than 2 dB and a total loss of less than 4 dB up to 40 GHz with a maximum phase shift of 480 . The proposed phased array antenna consists of four E-or H-plane Vivaldi antennas, a PET phase shifter, and a power divider. The phased array shows a wide beam scanning capability of 27 over a wide bandwidth from 8 to 26.5 GHz covering X, Ku, and K bands.Index Terms-Phased array, phase shifter, piezoelectric transducer (PET), wideband phased array.

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“…Therefore, low loss ferrite having large l r and e r is indispensable [8,9]. A dc bias magnetic field was applied to a ferrite antenna to lower magnetic tangent loss, thereby improving antenna gain [10][11][12][13][14][15][16][17]. It was observed that antenna gain was improved with the dc magnetic field.…”

mentioning

confidence: 99%

Electrically small ferrite antenna gain with dc magnetic field for mobile device application

Lee¹,

Hong²,

Lee³

et al. 2014

Micro & Optical Tech Letters

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, and with a matching circuit is 7 MHz (410-417 MHz), for a VSWR < 2. Figure 8 shows the different lengths of S T . We can see that as S T is increased, the resonant frequency moves to a lower frequency. In this design, the optimized value of S T is 28 mm. Figure 9 shows the measured radiation patterns at 415, 417, 420, and 423 MHz, respectively. Dipole radiation patterns (omnidirectional patterns) are achieved over the operating frequency band. The measured average gain of the proposed antenna is about 1.23 dBi. CONCLUSIONWe proposed a meandering dipole patch antenna for a sensor node of a wireless sensor network system. The proposed antenna was designed, fabricated, and characterized. The proposed antenna without a matching circuit covers the UHF band frequency (405-425 MHz). The proposed antenna modifies the meandering dipole structure and reduces the size of the antenna to k/6 (f C 5 415 MHz). The effects of the antenna geometry on the return loss were presented. The resonant frequency can be adjusted by changing the antenna geometry. In addition, the proposed antenna has an omnidirectional radiation pattern and relatively high gain over the frequency band.ABSTRACT: We demonstrate that electrically small ferrite antenna gain is significantly increased with a small dc magnetic field of compact Nd-Fe-B permanent magnet (9.5 3 4.6 3 1.5 mm 3 ). The experimental magnetic tangent loss of the Ni-Mn-Co ferrite decreased by about 62%, which was from 0.509 with 0 Gauss to 0.192 with 750 Gauss. The antenna gain increased by 54% (from 210.58 to 24.81 dBi) when the magnetic field of 1600 Gauss was applied to the antenna. The ferrite antenna has the volume of 0.346 cm 3 and shows omnidirectional patterns, which are suitable for hand-held mobile device applications.

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Magnetic steerable ferrite patch antenna array

Cited by 17 publications

References 7 publications

Magnetoelectric composites for miniature antennas

Magnetoelectric composites for miniature antennas

A low-cost 8 to 26.5 GHz phased array antenna using a piezoelectric transducer controlled phase shifter

Electrically small ferrite antenna gain with dc magnetic field for mobile device application

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