Control of mode-switching in an active antenna using MESFET

Minegishi, M.; Lin, Jenshan; Itoh, T.; Kawasaki, Shigeo

doi:10.1109/22.402275

Cited by 9 publications

(5 citation statements)

References 16 publications

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“…Several AIAs have been already demonstrated but very few active diversity antennas can be found in the literature. Efforts have been provided to achieve AIAs with diversity functions such as linear polarization switchable [3][4][5], frequency agile [6], pattern agile [7,8], and dualbeam functions [9][10][11][12][13]. A pattern reconfigurable AIA is investigated in ref.…”

Section: Introductionmentioning

confidence: 99%

A first‐harmonic push–push oscillator based active integrated dual‐beam switchable array antenna

Hasan

Nishiyama

Tanaka

et al. 2023

Electronics Letters

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This paper proposes a new active integrated array antenna (AIAA) for dual‐beam switchable functionality. The proposed AIAA comprises a first‐harmonic push–push oscillator, four linearly polarized microstrip antennas, and a switchable feed network. The first‐harmonic push–push oscillator eliminates the impact of load variation and usage of a filter to suppress the second‐ and higher‐harmonic frequency signals. By using the switchable feed network, the main beam direction of the radiation pattern can be switched between two states, i.e. θ=±10∘$\mathbf {\theta = \pm }10\mathbf {^{\circ }}$. The performance of the proposed antenna is experimentally evaluated. The measured results show an effective isotropic radiated power (EIRP) of +27.5 dBm, DC‐to‐RF efficiency of 20.26%, and figure of merit (FOM) of −155.2 dBc Hz−1 at the fundamental frequency of 5.9 GHz.

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Section: Introductionmentioning

confidence: 99%

A first‐harmonic push–push oscillator based active integrated dual‐beam switchable array antenna

Hasan

Nishiyama

Tanaka

et al. 2023

Electronics Letters

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“…With the advancement of wireless communication systems, solid-state devices, and integration technology, many researchers put efforts to explore multi-functional AIAs. Several multi-functional AIAs such as frequency [11,12], beam [13][14][15][16][17][18], and pattern [19,20] switchable have been found in the literature. Frequency agility is obtained in [11] by a varactor diode and in [12] by two PIN diodes.…”

Section: Introductionmentioning

confidence: 99%

Multi-layer approach of polarization agile oscillating-type active integrated array antennas for RFtransmitter front-end

Hasan

Nishiyama

Toyoda

2022

Int. J. Microw. Wireless Technol.

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This paper presents a polarization switchable self-oscillating active integrated array antenna (AIAA) using a multi-layer approach. The antenna comprises two antenna elements, four PIN diodes, and a Gunn oscillator employing a microstrip line resonator. Reconfiguring the feed network of the array antenna realizes slant polarization (± 45°) switching. The multi-layer structure allows the patch spacing to be adjusted, thereby helping to minimize the antenna's sidelobe level. The Gunn oscillator, which employs a λ/2 microstrip–line resonator, is placed at the bottom layer. The proposed AIAA has an effective isotopic radiated power (EIRP) of + 18.25 dBm at the oscillation frequency of 9.47 GHz. EIRP is improved by better than 8.45 dB compared to the single-layer structure. The proposed AIAA features a transmitted power of + 8.45 dBm, DC-to-RF efficiency of 1.0%, and a low phase noise of −101.8 dBc/Hz at 1-MHz offset frequency with better than 12-dB cross-polarization suppression.

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“…However, highly stable high-frequency sources with good output power are a challenging task. In general, two and three-terminal devices, mainly Gunn diodes [3][4][5][6][7] and FETs [8,9,[11][12][13][14][15][16][17][18] are used as an active device. But at high frequency, power handling capability of those devices decreases.…”

Section: Introductionmentioning

confidence: 99%

“…Several AIAs have already been reported in [8][9][10][11][12][13][14][15][16][17][18]. In [18], a Push-Push oscillator, PSK modulator, and ring-slot array antenna have been studied separately to propose a concept of self-oscillating active integrated array antenna (AIAA) for transmitter module.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, integration approach becomes matured, and therefore, many reconfigurable AIAAs including polarization [3][4][5][6], frequency [17], and pattern [8][9][10] functions have been reported in the literature. Besides, beam switchable AIAAs [7,[12][13][14] have also been studied as they have multi-directive beams to resolve multi-path and interference effects by redirecting their radiation patterns [20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Dual-Beam Switchable Self-Oscillating Ku-Band Active Array Antenna Integrating Positive Feedback Type Push-Push Oscillator and PSK Modulator

Hasan¹,

Nishiyama²,

Tanaka³

et al. 2021

PIER C

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Control of mode-switching in an active antenna using MESFET

Cited by 9 publications

References 16 publications

A first‐harmonic push–push oscillator based active integrated dual‐beam switchable array antenna

A first‐harmonic push–push oscillator based active integrated dual‐beam switchable array antenna

Multi-layer approach of polarization agile oscillating-type active integrated array antennas for RFtransmitter front-end

A Dual-Beam Switchable Self-Oscillating Ku-Band Active Array Antenna Integrating Positive Feedback Type Push-Push Oscillator and PSK Modulator

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