H-Plane Waveguide In-Phase Power Divider/Combiner With High Isolation Over the WR-3 Band

A novel <inline-formula> <tex-math notation="LaTeX">$H$ </tex-math></inline-formula>-plane waveguide in-phase power divider (also known as combiner) with high isolation working across full WR-3 band (220-330 GHz) is realized in this paper. This distinctive architecture is designed based on the sum-difference principle of Magic-T, whose <inline-formula> <tex-math notation="LaTeX">$E$ </tex-math></inline-formula>-plane branch (difference port) is matched with an <inline-formula> <tex-math notation="LaTeX">$E$ </tex-math></inline-formula>-plane T-junction. Both effects of processing and assembling uncertainties on this power divider/combiner performance are discussed in detail to display error sensitivity. The physical prototype is split into three blocks and processed by the state-of-the-art computer numerical control (CNC) milling technology. The absorbing materials are housed in the loaded T-junction arms to terminate return wave as well. Compared with the most reported terahertz waveguide power couplers, the meaningful measured results of this advanced in-phase power divider are delivered. The input and output matching as well as high isolation have been obtained over full WR-3 band, when an 11 dB reference level is considered. A total insertion loss of about 1.2 dB is achieved including three straight waveguides having a total length of 30 mm, which is also in good agreement with simulations. This module, which is fully compatible with the standard CNC-milling technique, can be directly integrated to terahertz detection systems.

[1]  Ke Wu,et al.  Ring-Shaped Substrate Integrated Waveguide Wilkinson Power Dividers/Combiners , 2014, IEEE Transactions on Components, Packaging and Manufacturing Technology.

[2]  Stepan Lucyszyn,et al.  Hybrid 3-D-Printing Technology for Tunable THz Applications , 2017, Proceedings of the IEEE.

[3]  Dongyang Wang,et al.  A megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam , 2018, Scientific Reports.

[4]  Jinyi Ding,et al.  A Novel Five-Port Waveguide Power Divider , 2014, IEEE Microwave and Wireless Components Letters.

[5]  Victor Belitsky,et al.  All-metal micromachining for the fabrication of sub-millimetre and THz waveguide components and circuits , 2008 .

[6]  Qing-Xin Chu,et al.  A $Ka$ -Band $E$ -Plane Waveguide Magic-T With Coplanar Arms , 2014 .

[7]  Qing-Xin Chu,et al.  A Ka-Band Waveguide Magic-T With Coplanar Arms Using Ridge-Waveguide Transition , 2017, IEEE Microwave and Wireless Components Letters.

[8]  S. Shi,et al.  A 90° Waveguide Hybrid with Low Amplitude Imbalance in Full W-Band , 2019, Journal of Infrared, Millimeter, and Terahertz Waves.

[9]  Erich Schlecht,et al.  THz Diode Technology: Status, Prospects, and Applications , 2017, Proceedings of the IEEE.

[10]  A. Kerr,et al.  A Broadband In-Phase Waveguide Power Divider/Combiner , 2000 .

[11]  Yong Mao Huang,et al.  Wideband isolation-improved substrate-integrated waveguide power dividers/combiners , 2018, International Journal of Microwave and Wireless Technologies.

[12]  Nuria Llombart,et al.  THz Imaging Radar for Standoff Personnel Screening , 2011, IEEE Transactions on Terahertz Science and Technology.

[13]  Jie Hu,et al.  Beam Shaping Performance Based on Metallic Corrugated Grooves and Dielectric Periodic Gratings at 500 GHz , 2018, IEEE Access.

[14]  R. Vincenti Gatti,et al.  Hermetic Broadband 3-dB Power Divider/Combiner in Substrate-Integrated Waveguide (SIW) Technology , 2018, IEEE Transactions on Microwave Theory and Techniques.

[15]  Jr. R. Wyndrum.  Microwave filters, impedance-matching networks, and coupling structures , 1965 .

[17]  J. Papapolymerou,et al.  Silicon Micromachined W-Band Hybrid Coupler and Power Divider Using DRIE Technique , 2008, IEEE Microwave and Wireless Components Letters.

[18]  M. Justen,et al.  A 490 GHz planar circuit balanced Nb-Al2O3-Nb quasiparticle mixer for radio astronomy: Application to quantitative local oscillator noise determination , 2012 .

[19]  Tibor Berceli.  My memories about the book: Microwave filters, impedance-matching networks, and coupling structures , 2014, 2014 44th European Microwave Conference.

[20]  T. Klapwijk,et al.  Josephson Parametric Reflection Amplifier with Integrated Directionality , 2017, Physical Review Applied.

[21]  Andreas Gustafsson,et al.  A 220–325 GHz low-loss micromachined waveguide power divider , 2017, 2017 IEEE Asia Pacific Microwave Conference (APMC).

[22]  Continuous-wave Y-band planar BWO with wide tunable bandwidth , 2018, Scientific Reports.

[23]  Victor Belitsky,et al.  Design of Wideband Waveguide Hybrid With Ultra-Low Amplitude Imbalance , 2016, IEEE Transactions on Terahertz Science and Technology.

[24]  Lei Cang,et al.  The Impact of Atmospheric Turbulence on Terahertz Communication , 2019, IEEE Access.

[25]  Goutam Chattopadhyay,et al.  Measurement of Silicon Micromachined Waveguide Components at 500–750 GHz , 2014, IEEE Transactions on Terahertz Science and Technology.

[26]  C. T. Cunningham,et al.  Design of a Sideband-Separating Balanced SIS Mixer Based on Waveguide Hybrids , 2000 .

[27]  W. K. Kahn.  E-Plane Forked Hybrid-T Junction , 1955 .

[28]  C. Briso-Rodriguez,et al.  Cryogenic Hybrid Coupler for Ultra-Low-Noise Radio Astronomy Balanced Amplifiers , 2009, IEEE Transactions on Microwave Theory and Techniques.

[29]  V. Radisic,et al.  WR1.5 Silicon Micromachined Waveguide Components and Active Circuit Integration Methodology , 2012, IEEE Transactions on Microwave Theory and Techniques.

[30]  Kamal K. Samanta,et al.  Substrate-Integrated-Waveguide E-Plane 3-dB Power-Divider/Combiner Based on Resistive Layers , 2017, IEEE Transactions on Microwave Theory and Techniques.

[31]  Y. Teng,et al.  A high-order mode extended interaction klystron at 0.34 THz , 2017 .

[32]  Joachim Oberhammer,et al.  A 230–300 GHz low-loss micromachined waveguide hybrid coupler , 2017, 2017 47th European Microwave Conference (EuMC).

[33]  C. Jung-Kubiak,et al.  A Silicon Micromachined Eight-Pixel Transceiver Array for Submillimeter-Wave Radar , 2015, IEEE Transactions on Terahertz Science and Technology.

[34]  Jun Sun,et al.  Experimental Study on a High-Power Subterahertz Source Generated by an Overmoded Surface Wave Oscillator With Fast Startup , 2013, IEEE Transactions on Electron Devices.

[35]  S. Shi,et al.  A Full WR-3 Band and Low-Loss 90° Waveguide Twist Based on CNC , 2020, IEEE Transactions on Terahertz Science and Technology.