Modelling of Reconfigurable Terahertz Integrated Architecture (Retina) Siw Structures

Abstract

Abstract-This paper discusses for the first time the combined optoelectronic-electromagnetic modelling of a new technology that represents a paradigm shift in the way millimetre-wave and terahertz electronics can be implemented using the REconfigurable Terahertz INtegrated Architecture (RETINA) concept.Instead of having traditional metal-pipe rectangular waveguide structures with metal sidewalls, RETINA structures have photo-induced virtual sidewalls within a high resistivity silicon substrate. This new class of substrate integrated waveguide (SIW) technology allows individual components to be made tuneable and subsystems to be reconfigurable, by changing light source patterns. Detailed optoelectronic modelling strategies for the generation of virtual sidewalls and their electromagnetic interactions are presented in detail for the first time. It is found with double-sided illuminated RETINA structures that an insertion loss of 1.3 dB/λ g at 300 GHz is predicted for the dominant TE 10 mode and for a cavity resonator a Q-factor of 4 at 173 GHz is predicted for the TE 101 mode. While predicted losses are currently greater than other non-tuneable/reconfigurable SIW technologies, there is a wide range of techniques that can be investigated to considerably improve their performance, while still allowing completely arbitrary topologies to be defined in the x-z plane and in real time. For this reason, it is believed that this technology could have a profound impact on the future of millimetre-wave and terahertz electronics. As a result, this paper could be of interest to research groups that have the specialised experimental resources to implement practical demonstrator exemplars.

Lossy Spherical Cavity Resonators for Stress-Testing Arbitrary 3d Eigenmode Solvers

“…Table 1. Relaxation frequencies for various conducting wall materials at room temperature [18,19] with the exact results. Clearly, the fundamental TM 011 mode is theoretically supported for all air-filled spherical cavity resonators not having perfectly lossless walls (i.e., with σ 0 > 0).…”

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

“…Although various components have been developed for THz applications [5][6][7][8][9][10][11][12][13][14][15][16][17][18], high power, low cost, and compact THz sources are not readily available [19]. With the rapid advancement of multi-physics based codes, which provide the possibility of simulating the nonlinear beam-wave interaction dynamics [20][21][22][23][24], extending the operating frequency of the existing microwave tube designs [25][26][27][28][29] has become a promising approach for developing compact and powerful THz sources [30][31][32][33][34][35][36].…”

A Substrate Integrated Waveguide to Substrate Integrated Coaxial Line Transition

“…Substrate integrated waveguide (SIW) and substrate integrated coaxial line (SICL) are becoming more and more popular [1,2], and substrateintegrated technology (SIT) represents an emerging and promising candidate for the development of components and circuits operating in the microwave and millimeter-wave or terahertz region [3][4][5][6][7][8][9]. As shown in Fig.…”