We present a tightly coupled array antenna excited by high-power photodiodes for millimeter wave transmit operation. The design includes thinned photodiode substrates improved bandwidth performance at high frequency combined with the inherently lightweight, low-loss, and direct feeding architecture afforded photonic approach. Circuit full simulations are conducted compared against traditional e...

Abstract Electromagnetic waves that have a wavelength of less than one millimeter are referred to as sub waves. In wave-based devices and systems, antennas critical components vital their operation. Antennas used in situations when transition between directed wave free-space is needed. Since, electromagnetic characteristics for receiving transmission the nano antenna mutually invertible, proper...

A novel optical millimeter-wave generation using sideband injection locking is demonstrated using monolithic two-section DFB lasers. The tunable millimeter-wave is generated by adjusting the RF-modulation frequency and bias currents. Summary The optical generation of millimeter-wave has been demonstrated and attracted much attention because of its flexibility and applicability in broadband mobi...

The wide band at extremely high frequencies (EHF) above 30 GHz is applicable for high resolution directive radars, resolving the lack of free frequency bands within the lower part of the electromagnetic spectrum. Utilization of ultra-wideband signals in this EHF band is of interest, since it covers a relatively large spectrum, which is free of users, resulting in better resolution in both the l...

Owing to simple structure, low cost and high performance, NRD-guide millimeter wave circuits have attracted much attention in recent years. In this paper, a variety of NRD-guide passive components are reviewed with emphasis on design techniques and performance estimation in the 60 GHz frequency band where the license-free advantage is available. The passive components to be discussed here inclu...