Analysis of Modulated Terahertz Wave Radiation Characteristics in a Monolithic Integrated Structure Consisting of a Resonant Tunneling Diodes, a Photodiodes and a Self-Complementary Bow-Tie Antenna

Masataka NAKANISHI  Michihiko SUHARA  Kiyoto ASAKAWA  

IEICE TRANSACTIONS on Electronics   Vol.E102-C   No.6   pp.466-470
Publication Date: 2019/06/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.2018FUS0005
Type of Manuscript: BRIEF PAPER
triple-barrier resonant tunneling diodes,  bow-tie antenna,  several hundred GHz,  photodiodes,  modulation,  nonlinear differential conductance,  

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We numerically demonstrate a possibility on-off keying (OOK) type of modulation over tens gigabits per second for sub-terahertz radiation in our proposed wireless transmitter device structure towards radio over fiber (RoF) technology. The integrated device consists of an InP-based compound semiconductor resonant tunneling diode (RTD) adjacent to an InP-based photo diode (PD), a self-complementary type of bow-tie antenna (BTA), external microstrip lines. These integration structures are carefully designed to obtain robust relaxation oscillation (RO) due to the negative differential conductance (NDC) characteristic of the RTD and the nonlinearity of the NDC. Moreover, the device is designed to exhibit OOK modulation of RO due to photo current from the PD inject into the RTD. Electromagnetic simulations and nonlinear equivalent circuit model of the whole device structure are established to perform large signal analysis numerically with considerations of previously measured characteristics of the triple-barrier RTD.