Wideband Electronically Tunable GaAs Gunn VCO's at W-Band (75-110GHz)

Ondria, J.

doi:10.1109/mwsym.1985.1131987

Cited by 8 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A capacitive disc and inductive post is placed in between the Gunn Diode and RF choke, which are tuned to match the impedance for desired frequency of oscillation and satisfy the well known condition of Equation . Gunn diode and disc‐post assembly is placed at λ g /4 distance away from movable short at 47 GHz, which interacts with maximum electric field of fundamental mode and minimizes its interference with the second harmonic radial disc dominant mode fields …”

Section: Oscillator Design Methodologymentioning

confidence: 99%

“…These devices are capable of providing RF power for fundamental and second harmonic operation as well. Previous work elaborate theoretical and experimental analysis to design a fundamental and subharmonic Gunn diode based oscillator . It was observed from that the most important structure, for desired frequency of oscillation, in a cavity based single diode oscillator is probably the disc‐post resonating structure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and optimization of a tunable W‐band subharmonic cavity based Gunn diode oscillator using computer‐aided design technique

Singh

Kumar

Biswas

2019

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

In this work, a systematic computer‐aided design technique is proposed to minimize the fabrication iteration for the design and development of W‐band subharmonic Gunn diode oscillator with wideband tunable bandwidth at W‐band. Gunn diode based single diode oscillator structure was divided into passive and active parts to facilitate the modeling of the component on appropriate simulation environment. Resonating structure and package of Gunn diode are modeled as passive circuit in high frequency structure simulator (HFSS). To satisfy the oscillator design equation, disc‐post resonating structure is tuned in HFSS and its S‐parameters are collaborated with the model of Gunn diode in advanced design system. Magnitude and phase of reflection coefficient (S11) is observed to ascertain the desired frequency of oscillation. Proper tuning of disc‐post structure is done on simulation platform, which reduces the fabrication complexity and cost as well. The measurement results validate the models designed using EM and circuit simulator. The measured maximum stable RF power without any fabrication iteration is 14.2 dBm. A tunable bandwidth of 4 GHz with power output ripple of ±1 dB is measured by using a movable backshort.

show abstract

Section: Oscillator Design Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and optimization of a tunable W‐band subharmonic cavity based Gunn diode oscillator using computer‐aided design technique

Singh

Kumar

Biswas

2019

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…To improve the bandwidth of a waveguide VCO, a careful design of the cavity resonator is required, covering many details including the low pass filters, the resonator disc, the distance between the Gunn and the varactor diodes, and the position of the sliding back short [2]- [4]. Even with this proper cavity design, however, tuning of the individual VCO is usually required to achieve desired characteristics, because commercial Gunn diodes in the millimeter-wave frequencies, in spite of the same part number and manufacturer, always come with non-negligible variations in their electrical characteristics.…”

Section: Introductionmentioning

confidence: 99%

New Tuning Method for 94 GHz Waveguide Voltage Controlled Oscillator

Lee

Baek

et al. 2011

IEEE Microw. Wireless Compon. Lett.

View full text Add to dashboard Cite

We propose a simple, yet highly effective tuning method to increase the bandwidth of a waveguide voltage controlled oscillator (VCO) by applying controlled mechanical pressures to the packaged Gunn diode mounted in the waveguide cavity resonator. When we applied this method to a varactor-tuned, second-harmonic 94 GHz VCO, the bandwidth was doubled to 1 GHz with an output power over 14.8 dBm, which is suitable for frequency-modulated continuous-wave radar sensor applications.Index Terms-Bandwidth, cavity resonator, Gunn diode, tuning, voltage controlled oscillator (VCO), waveguide, 94 GHz.

show abstract

“…The oscillation using Gunn diode can oscillate up to 67 GHz, therefore the center frequency is oscillated at 47 GHz and it produces a second-harmonic output of 94 GHz [6].…”

Section: Introductionmentioning

confidence: 99%

94 GHz Waveguide VCO for FMCW radar

Lee

et al. 2008

2008 Global Symposium on Millimeter Waves

View full text Add to dashboard Cite

In this paper, we designed and fabricated waveguide voltage controlled oscillator (VCO), which have a center frequency of 94 GHz using the GaAs Gunn diode, varactor diode, and two bias posts with low pass filter (LPF). The cavity is designed for fundamental mode at 47 GHz and operated second harmonic VCO of 94GHz center frequency. The fabricated VCO has 1.74 GHz bandwidth, 671MHz linearity for 2.28% and 14 dBm output power. The highest output power is 15.58dBm at 94.38 GHz

show abstract

Wideband Electronically Tunable GaAs Gunn VCO's at W-Band (75-110GHz)

Cited by 8 publications

References 8 publications

Design and optimization of a tunable W‐band subharmonic cavity based Gunn diode oscillator using computer‐aided design technique

Design and optimization of a tunable W‐band subharmonic cavity based Gunn diode oscillator using computer‐aided design technique

New Tuning Method for 94 GHz Waveguide Voltage Controlled Oscillator

94 GHz Waveguide VCO for FMCW radar

Contact Info

Product

Resources

About