A 290–310 GHz Single Sideband Mixer With Integrated Waveguide Filters

Guo, Cheng; Shang, Xiaobang; Lancaster, M.J.; Xu, Jun; Powell, Jeffrey R.; Wang, Hui; Parow-Souchon, Kai; Henry, M.; Viegas, Colin; Alderman, Byron; Huggard, P. G.

doi:10.1109/tthz.2018.2841771

Cited by 32 publications

(12 citation statements)

References 24 publications

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“…In comparison to the 220 GHz sub-harmonic mixers designed by the SDM [25]- [27], the mixer designed by the HS-HGDM exhibits such advantages as simple circuit structure, low conversion loss and low DSB noise temperature. And relative to the 220 GHz sub-harmonic mixers designed by the GDM [31], the mixer designed by the HS-HGDM with a single LPF is effective in reducing the flatness of SSB conversion loss.…”

Section: Discussionmentioning

confidence: 99%

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A 200–240 GHz Sub-Harmonic Mixer Based on Half-Subdivision and Half-Global Design Method

Cui

Zhang

et al. 2020

IEEE Access

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For the terahertz harmonic mixer, a design model based on Half-Subdivision and Half-Global Design Method (HS-HGDM) with a single functional unit is proposed. The single functional unit circuit of the mixer, such as LO or IF Low Pass Filter (LPF), is designed by Subdivision Design Method (SDM), and the rest circuits of the mixer are designed by Global Design Method (GDM). The harmonic mixer based on this model is characterized by simple circuit structure, low conversion loss, small circuit size and high stability. In this paper, an improved Compact Suspended Micro-strip Resonators (CSMRs) filter is developed for the IF part of sub-harmonic mixer. The remaining circuits consist of some basic transmission units, such as the High-Z Low-Z impedance Transmission Lines (H-Z L-Z TLs) applied for main circuit, and full/reduced height WR4.3/WR8 applied for providing RF/LO signal. In RF frequency range 200-240 GHz, a Single Sideband (SSB) conversion loss of 7.36±0.76 dB operating at IF frequency 1.8 GHz, and a Double Sideband (DSB) noise temperature below 1034 K with the LO power of 2-5 mW and the LO frequency of 107 GHz were achieved. This broadband sub-harmonic mixer operates at room temperature, which makes it applicable to sub-millimeter wave or terahertz wireless communication systems and imaging inspection systems. INDEX TERMS Terahertz sub-harmonic mixer, CSMRs filter, wireless communication systems.

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Section: Discussionmentioning

confidence: 99%

“…Also, this mixer has a narrow frequency band and poor flatness. In [27], a 290-310 GHz sub-harmonic mixer with the RF waveguide filter, the LO filter and the IF filter is reported. The measured SSB conversion loss is 9-10 dB, and the DSB noise temperature is 1000-1500 K with the operation bandwidth of merely 20 GHz.…”

Section: Introductionmentioning

confidence: 99%

A 200–240 GHz Sub-Harmonic Mixer Based on Half-Subdivision and Half-Global Design Method

Cui

Zhang

et al. 2020

IEEE Access

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“…In this work, the impedance matching of the diode chip is realized by waveguide filters using a coupled resonator design methodology [26], [27]. The circuit configuration is shown diagrammatically in Fig.…”

Section: Tripler Design and Thermal Considerationsmentioning

confidence: 99%

“…The two resonators belong to the input and output filters, respectively. Coupled resonator filters were successfully used as impedance matching networks for a wide range of devices such as mixers [26], frequency multipliers [27], and amplifiers [28]- [33], from a few gigahertzes to 300 GHz. One advantage is the compact circuit size with filtering, matching, and the waveguide to microstrip (MS) transition to be realized in one structure.…”

Section: Tripler Design and Thermal Considerationsmentioning

confidence: 99%

“…One advantage is the compact circuit size with filtering, matching, and the waveguide to microstrip (MS) transition to be realized in one structure. The other benefit is that lower loss can be achieved, as most of the matching elements were moved from the MS circuit into the waveguide resonators [26], [27]. The detailed design procedure of the triplers is given in Section II-A.…”

Section: Tripler Design and Thermal Considerationsmentioning

confidence: 99%

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A 135–150-GHz Frequency Tripler Using SU-8 Micromachined WR-5 Waveguides

Guo

Huggard

Dhayalan

et al. 2020

IEEE Trans. Microwave Theory Techn.

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This article presents a 135-150-GHz Schottky diode-based bias-less frequency tripler based on SU-8 micromachined WR-5 waveguides. The waveguides consist of five 432-µmthick silver-plated SU-8 layers, which house the diode chip and form the output matching network. The input matching circuit is realized in a computer numerical control (CNC) milled waveguide filter, which also provides support and thermal sink to the SU-8 waveguides. Considering the low thermal conductivity of the SU-8 material, auxiliary metallic thermal paths are designed, and the impact of these is discussed through thermal modeling. The thermal simulations show that under 50-mW power dissipation in the diode anodes, the maximum temperature of the SU-8 tripler is predicted to be 346 K at the diode junction, only 7 K higher than in an entirely metal equivalent. The tripler was measured to have a conversion loss of 16-18 dB and the input return loss is better than 18 dB. This work demonstrates that SU-8 micromachined waveguides can be used to package high-frequency semiconductor components, which, like other photolithography-based processes such as silicon deep reactive ion etching (Si-DRIE), has the potential for submicrometer feature resolution.

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