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We present a new distributed parasitic equivalent circuit model to accurately reproduce the frequency response of electromagnetic field couplings within the structure of submillimeter-wave high electron mobility transistors in the millimeter-wave and terahertz bands. To construct the proposed circuit model, we develop a multi-step parameter extraction algorithm, and demonstrate its accuracy through...
This paper describes some investigations, made using coaxial launch connectors and microwave probes, into the scattering parameters (S-parameters) measurements for a highspeed Printed Circuit Boards (PCBs) by using Vector Network Analyzers (VNAs) operating at microwave frequency up to 50GHz. The grounded Coplanar Waveguide (GCPW) transmission line with Electromagnetic Band Gap (EBG) in ground planes...
In this work a modern measurement method has been utilized in order to characterize nonlinear behavior of bulk acoustic wave (BAW) solidly mounted resonators (SMR). Unlike typical nonlinearity characterization methods, the method which was employed here not only records amplitudes, but also the phase of generated harmonics. Furthermore, the relations between the harmonics of different order are given...
This paper introduces a recently constructed V-band and an under development W-band waveguide microcalorimeters that will serve as primary power standards in KRISS. The design scheme of the V- and W-band microcalorimeters is briefly presented, and their basic performance was checked. We propose a thermoelectric reference standard that will cover V- and W- bands. We also propose an in-house V-band...
We present the repeatability performance of an automated non-contact probe system for on-wafer device and integrated circuit characterization in the 500–750 GHz band. Unlike conventional contact-probe systems, a computer controlled x-y translation stage is employed to realize a completely automated non-contact probe setup. Thanks to this simplicity, far superior repeatability performance can be achieved...
In this paper, we present a simplified calibration procedure to obtain on-wafer power levelled s-parameters when employing VNA extender modules. The approach presented removes the required calibration at the module interface (i.e., waveguide), by assuming symmetry in the tracking terms of the error coefficient and only requiring an on-wafer calibration and the knowledge of the two port s-parameters...
An alternative is proposed for the line pairing process that underspans the multi-line Thru-Reflect-Load (M-TRL) calibration. The tensor decomposition based method shows a potential to further improve the calibration accuracy.
In this paper, the effective efficiency of the thermistor mount was evaluated by three WR-22 (33–50 GHz) rectangular waveguide microcalorimeters. Three sets of microcalorimeter were made from the same design drawing. The only difference among them was some key parts (thermal conductive plate and heat isolation section) coming from different manufactures. The relative deviation of measurement results...
Here we present a comparison of the Large Signal Measurements provided by both a VNA based and a sampler based LSNA system. In this study, in order to achieve a robust and reliable relative phase calibration a dual frequency phase differential method was used. Significantly this work compares measurements performed under both CW and pulse mode operation. Very similar RF I-V waveforms are achieved...
In this work, an impedance renormalization technique dedicated for single-element de-embedding algorithm is proposed. By performing impedance modulation using CMOS transistors, reflection measurements with both ideal shorts and opens are generated from the measured two-port S-parameters. Such measurements with known terminations are further utilized for finding the solution to the test fixture and...
Multiple-input-multiple-output (MIMO) antenna will play a key role in the development of fifth generation (5G) wireless mobile communication systems due to their performance-enhancement capability in multipath environment. Antenna radiation efficiency is an important parameter for MIMO antenna system. In this paper, we present a comparison of MIMO antenna efficiency measurements performed in Anechoic...
In this contribution we present a frequency scalable approach to achieve an accurate power control for levelled s-parameters and large signal characterization of devices working at millimeter and sub-millimeter waves. The method is based on a software-aided control loop that mimics the behavior of an automatic level control system, allowing to dynamically adjust the power delivered to the DUT at every...
This article presents an adaptive method for antenna reflection and transmission parameters measurements using a calibrated vector network analyzer without an anechoic chamber. The method is based on a special distance-frequency system model simulating signals of local reflectors. Antenna parameters are extracted from measurement results by using a special estimation algorithm based on the least mean...
This paper presents a measurement technique for de-embedding the noise figure of all sorts of differential amplifiers having arbitrary common-mode rejection. It is based on the measurement of the correlation of the noise waves at the output ports of the differential amplifier. It makes use of a hybrid coupler and takes into account the phase and amplitude imbalances of the latter. Measurement results...
We propose a compact and low-cost waveform source that can be used to calibrate the magnitude and phase response of vector receivers over a bandwidth as large as a few gigahertz. The generator consists of a broadband comb generator followed by a filter and amplifier. As a demonstration, we constructed and calibrated a source suitable for calibrating vector signal analyzers operating between 43 GHz...
This paper presents an automatized on-wafer time-domain active load-pull set-up specifically developed for the characterization of High Power GaN High-Electron Mobility Transistors (HEMTs). This set-up is associated to a specific methodology for the design of Doherty Power Amplifier (DPA). This methodology has been applied to a GaN technology transistor: from the on-wafer measured Time-Domain Waveforms...
Microstrip open end (Open) applied as a calibration standard in frequency band up to 26 GHz was analyzed using CST Microwave Studio (CST). Arlon CuClad 233 with thickness 0.508mm was used for simulations. Different lengths of the microstrip lines in front of the Open were considered. Significant influence of the radiated field and the length of the microstrip line on the reflection coefficient magnitude...
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