Measurement of dielectric properties of nematic liquid crystals at millimeter wavelength

S Bulja, D Mirshekar-Syahkal, R James… - IEEE Transactions …, 2010 - ieeexplore.ieee.org
Due to their large birefringence and moderately low loss, liquid crystals (LCs) are a
promising dielectric media for development of a variety of reconfigurable millimeter-wave …

Microstrip device for broadband (15–65 GHz) measurement of dielectric properties of nematic liquid crystals

P Deo, D Mirshekar-Syahkal, L Seddon… - IEEE Transactions …, 2015 - ieeexplore.ieee.org
The essential dielectric properties, the basic alignment techniques, and the common
measurement methods of the nematic liquid crystal (LC) at RF are briefly reviewed. A new …

On the matching of microstrip-fed dielectric resonator antennas

A Rashidian, MT Aligodarz, L Shafai… - IEEE Transactions on …, 2013 - ieeexplore.ieee.org
As the permittivity of dielectric resonators decreases, it becomes difficult to feed the dielectric
resonator antennas (DRAs) using direct microstrip lines. The variation of the resonant input …

High frequency resistive switching behavior of amorphous TiO2 and NiO

S Bulja, R Kopf, A Tate, M Cappuzzo, D Kozlov… - Scientific Reports, 2022 - nature.com
Resistive switching (RS) of Transition Metal Oxides (TMOs) has become not only an
attractive choice for the development of next generation non-volatile memory, but also as a …

95-GHz front-end receiving multichip module on multilayer LCP substrate for passive millimeter-wave imaging

Y Zhang, RD Martin, S Shi, AA Wright… - IEEE Transactions …, 2018 - ieeexplore.ieee.org
In this paper, directional filters (DFs) are first proposed to improve the stability of multichip
modules (MCMs), and a new integration approach between microstrip line on liquid crystal …

High Frequency Dielectric Characteristics of Electrochromic, WO3 and NiO Films with LiNbO3 Electrolyte

S Bulja, R Kopf, A Tate, T Hu - Scientific reports, 2016 - nature.com
A great deal of attention has been recently focused on Electrochromic (EC) materials and
EC based devices, promoting mainly applications related to display technology. In this case …

Electrochromic cell for radio-frequency applications

S Bulja, RF Kopf - US Patent 10,033,080, 2018 - Google Patents
A disclosed electrical cell enables experimental measurements of dielectric properties of an
electrochromic material in the radio-frequency range of the electromagnetic spectrum. In an …

Ka-band surface-mount cross-coupled SIW filter with multi-layered microstrip-to-GCPW transition

G Lee, B Lee, JY Jeong, J Lee - IEEE Access, 2019 - ieeexplore.ieee.org
This paper presents the design of a Ka-band cross-coupled substrate-integrated waveguide
(SIW) bandpass filter using a newly proposed cross-coupling structure. The benefits of using …

Broadband transition design from microstrip to CPW

Z Tao - IEEE Microwave and Wireless Components Letters, 2015 - ieeexplore.ieee.org
This letter presents a broadband transition between microstrip and CPW located at the
opposite lawyer of the substrate. Basically, the transition is based on two couples of …

Tuneable dielectric and optical characteristics of tailor-made inorganic electro-chromic materials

S Bulja, R Kopf, K Nolan, R Lundy, A Tate, TC Hu… - Scientific Reports, 2017 - nature.com
Electro-chromic materials (EC) are a new class of electronically reconfigurable thin films that
have the ability to reversibly change optical properties by electric charge insertion/extraction …