Investigation of SIW‐based planar integrated w‐band low‐phase noise Gunn harmonic oscillator

Abstract

Based on the substrate integrated waveguide (SIW) technology, the influence of SIW cavity on phase noise of W-band oscillator is studied and a novel W-band low phase noise GaAs Gunn planar harmonic oscillator is developed in this letter. The technique of harmonic extraction from Gunn diodes and the novel SIW cavity structure with short piston, which is introduced to study the influence of SIW cavity on phase noise of oscillator, are discussed in detail. Because of the high quality factor and planar structure of the SIW cavity resonator, the oscillator is characterized by some advantages such as low phase noise, small size, low cost and planar integration. The optimal phase noise is À105.81 dBc/Hz at 1 MHz offset 92.16 GHz carrier frequency and the measured output power is more than 6.2 dBm.

Planar substrate integrated waveguide‐based resonators and its usage to compact X‐band small phase noise oscillator

“…4 Dielectric resonators and waveguide resonators are high-quality factor 3D structures. [5][6][7] However, they are not convenient for the monolithic microwave integrated circuits (MMICs) because of the costly issue and nonplanar profile. Although, several methods including microstrip-resonators and striplineresonators 8,9 have been proposed to reduce the PN of the microwave oscillators.…”

“…Dielectric resonators and waveguide resonators are high‐quality factor 3D structures 5–7 . However, they are not convenient for the monolithic microwave integrated circuits (MMICs) because of the costly issue and nonplanar profile.…”

High efficiency and suppression harmonics oscillator using front coupled tapered CMRC

“…9, and is designed to obtain higher order harmonic termination in a low‐pass filter with a compact circuit size. The design of microwave oscillator using microstrip structures as an efficient method was proposed, such as: ring‐type resonant cell as its terminating resonance component [10], spiral spurline resonators [11], substrate integrated waveguide (SIW) technology [12], microstrip oscillator consisting of an active source and an output patch antenna[13], L‐type spurline and meander spurline resonators [14], and high‐Q SIW bandpass filter [15], push–push dielectric resonator [16],voltage‐controlled oscillator using SIW [17]. Furthermore, using of the specific resonator for terminating resonance was proposed such as modified hairpin resonator [18, 19].…”