A periodic second harmonic spatial power combining oscillator

Mortazawi, Amir; Foltz, Heinrich; Itoh, T.

doi:10.1109/22.137390

Cited by 42 publications

(9 citation statements)

References 13 publications

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“…The strip line is configured on the top side and the ground plane at the bottom side of the microstrip material as shown in Figure 1, and acts as the transmission media where the electromagnetic wave propagate. The most common dielectric materials used in the microstrip technique are duroid [6] with relative permitivity ε r = 2.56 ε o , quartz (ε r = 2.78 ε o ), alumina (ε = 9.7ε o ), silicon (ε = 11.7 ε o ), teflon (ε = 2.56 ε o ), with ε o is free space permitivity (ε o = 8.854 x10 -12 F/m. In this research, we choose diclad materials to provide a better radiation performance.…”

Section: Antenna Design and Simulationmentioning

confidence: 99%

Realization of a Second Harmonic Antenna for Rural Communications

Kurniawan¹,

Hasyim²,

Wahyu³

2006

itbj.eng.sci.

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Abstract. In this research, an active antenna operated at the second harmonic frequency is investigated, and is implemented using microstrip antenna material. The antenna consists of a FET oscillator which plays as a fundamental frequency oscillator and a frequency multiplier, and a patch antenna resonated at the second harmonic frequency as the radiator. A maximum second-harmonic output power can be extracted when the load impedance of the oscillator is optimized both at the fundamental and at the second harmonic frequencies. A rectangular patch antenna is used to radiate the second harmonic output power from the oscillator. The patch impedance is matched resistively at the second harmonic frequency. The patch antenna is fabricated using Diclad 522 microstrip substrates (relative permitivity  r = 2.5) with a dielectric thickness of 1.57 mm. A GaAs FET AT-8250 transistor is used as an oscillator and a frequency multiplier and acts as the active component. Fundamental frequency is designed at 2,4 GHz band, so that the second harmonic frequency operates at 4,8 GHz band. The frequency is chosen to facilitate and to extend the needs of communications in rural areas using the unlicensed Industrial Scientific, and Medical (ISM) band. Operating the communication infrastructures intended for the use at 2.4 GHz band at its second harmonic frequency, is intended to alleviate interference levels at 2.4 GHz.

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Section: Antenna Design and Simulationmentioning

confidence: 99%

Realization of a Second Harmonic Antenna for Rural Communications

Kurniawan¹,

Hasyim²,

Wahyu³

2006

itbj.eng.sci.

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“…But at millimeter and sub-millimeter wave frequencies solidstate devices have limited capability to produce microwave energy; the efficiency of solid state devices drops dramatically [1].…”

Section: Introductionmentioning

confidence: 99%

“…Many power combining techniques are used [1,3,4]. For example, 3 W peak power near 145 GHz were obtained by combining two pulsed IMPATT diodes in a resonant waveguide cavity [5].…”

Section: Introductionmentioning

confidence: 99%

A 20 W W-band pulse solid-state transmitter using injection-locked compact cascaded power combining networks

Liu

Tang

Cao

2010

2010 International Conference on Microwave and Millimeter Wave Technology

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The compact cascade W-band power combining network is analyzed firstly, then a high-power W-band injectionlocked pulse solid-state transmitter using three injection-locked compact cascaded power combining networks as the final stage is developed using frequency multiplier chain and injection locking. At last, optimized pulse peak output power of more than 20 W and locking range of 500 MHz at 94.2 GHz is achieved. The transmitter is operated at 88 ns pulse width and a PRF of 20 kHz. This transmitter development is directed at achieving a highpower output in compact structure that would useful for miniaturized millimeter-wave system applications.

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“…One way to obtain the millimeter-wave signal from a circuit by the solid-state device such as an FET is to make use of harmonic generation due to its nonlinearity [4]. We have already proposed a second harmonic spatial power combiner for a quasi-optical array [5].…”

Section: Introductionmentioning

confidence: 99%

Second harmonic uniplanar active integrated antenna array with strong coupling

Kawasaki

Itoh

1993

23rd European Microwave Conference, 1993

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In this paper, a new technique to realize a small-sized uniplanar active integrated antenna array using FET's and CPW's is reported. To analyze the entire circuit including the slot input impedance, a large signal analysis was carried out including reactance due to CPW discontinuities. A 4-element array operated at the fundamental frequency of 7.5 GHz and at the second harmonic frequency of 15 GHz. Spatially separated radiation patterns were obtained at each frequency.

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A periodic second harmonic spatial power combining oscillator

Cited by 42 publications

References 13 publications

Realization of a Second Harmonic Antenna for Rural Communications

Realization of a Second Harmonic Antenna for Rural Communications

A 20 W W-band pulse solid-state transmitter using injection-locked compact cascaded power combining networks

Second harmonic uniplanar active integrated antenna array with strong coupling

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