A5010863068- Electromagnetic Compatibility and Measurements
- Microwave and Dielectric Measurement Techniques
- Photonic and Optical Devices
- Antenna Design and Optimization
- Microwave Engineering and Waveguides
- Photonic Crystals and Applications
- Terahertz technology and applications
- Electromagnetic Compatibility and Noise Suppression
- Acoustic Wave Resonator Technologies
- Telecommunications and Broadcasting Technologies
- Advanced Chemical Sensor Technologies
- Superconducting and THz Device Technology
- Distributed Sensor Networks and Detection Algorithms
- Advanced Measurement and Detection Methods
- Real-time simulation and control systems
- Millimeter-Wave Propagation and Modeling
- Advanced Antenna and Metasurface Technologies
- Aerospace and Aviation Technology
- Advanced MEMS and NEMS Technologies
- Radio Frequency Integrated Circuit Design
- Historical Studies in Central America
- Transportation Systems and Infrastructure
- Antenna Design and Analysis
- Power Line Communications and Noise
- Outsourcing and Supply Chain Management
Physikalisch-Technische Bundesanstalt
2016-2025
Technische Universität Braunschweig
2017
The application of frequencies beyond 300 GHz in the so-called THz frequency range requires electronic beam steering, which can be realized by a phased array. In this paper, measurement results novel array antenna with horn elements and targeted gain 20.7 dBi for communications are presented. compared to simulations respect patterns, gain, half power width, dependence these matching elements. An outlook towards measurements patterns as whole concludes paper.
Horn antenna phase center position is an essential parameter to perform calibration at the sub- THz band. We present two measurement setups measure center, using power delay profile (PDP) magnitude and PDP for horn antennas WR05 WR03 bands compared antenna's dimensions.
Abstract. In this study, the impact of local oscillator cable movements or drift during VNA measurements using frequency extenders is investigated. A non-reciprocal measurement error caused by alterations signal in R 900 (WR 10) waveguide from 75 to 110 GHz observed and systematically analyzed. Furthermore, theory behind effect its implications on results are discussed, as well possible corrections for both calibrated raw data.
Antenna calibration requires the exact knowledge of phase center position. In addition, accuracy is often affected by multi-path propagation. We present an approach to reliably estimate position and correct for propagation effects demonstrate performance this with horn antennas in W-band between 75 GHz 110 GHz.
Abstract. In this paper, we describe measurement results of the signal-in-space very high frequency (VHF) omnidirectional range (VOR) facilities. aviation VOR are used to display current course aircraft in cockpit. To understand influence wind turbines (WT) on signal integrity terrestrial navigation and radar signals, content its changes, respectively, must be investigated. So far, only numerical simulations have been carried out frequency-modulation (FM) part Doppler-VOR (DVOR) estimate WT...
Abstract Here we propose a 3D printed form-birefringent achromatic quarter-waveplate targeting the lower terahertz frequency range. The monolithically fabricated waveplate consists of three individual layers different thickness and orientation stratified structure resulting in response. experimental results show that performance fits optimal behaviour within 5 % terms ellipticity phase shift for frequencies between 75 GHz 110 GHz.
Depending on the frequency range of interest, influence chamber reflections can be a dominant contribution to measurement uncertainty when calibrating antennas. Estimating this is relatively cumbersome and, strictly speaking, requires new analysis for each unknown antenna, since depends probe, chamber, being examined and antenna under test. This article shows how modern transformation algorithms used determine through redundant measurements. The focus here procedures that are simple carry...
This article reports on an extensive interlaboratory comparison of measurements material properties between 2 GHz and 1 THz using both vector network analyzer (VNA)-based optical-based methods. For the former, techniques including open resonators, conventional free-space quasioptical systems, a relatively new guided approach through use characterization kits (MCKs) were utilized. The methods included time-domain spectroscopy (TDS) frequency-domain (FDS). Measurement setups for these five...
There are two widely used classes of algorithms to determine the far-field properties antennas from near-field measurements: modal expansion, e.g., spherical wave expansion and source reconstruction. In this paper, robustness both approaches with respect typical uncertainty contributions data is assessed based on real measurements. Particularly, influence incomplete probe correction multipath propagation considered exemplarily.
In 1989, the Salt River Project (SRP), a utility that serves customers in and around Phoenix, Arizona area, made significant changes its organizational structure. The company started process of revising corporate culture to reflect business marketing environment industry.
The use of active antenna arrays in mobile radio applications such as 5G New Radio has made it necessary to define new metrics evaluate these systems. guidelines the network are regulated by 3GPP and require conformity testing. legal rules, which serve for protection persons against electromagnetic fields, have be fulfilled part approval procedure a base station. In this paper, requirements presented regarding definition radiation patterns. It also shows measurement method measuring envelope...
A design of a three-dimensional printed achromatic $\lambda$/4 waveplate based on form-birefringence targeting the lower terahertz (THz) frequency range is proposed. For stratified structure employed which gives rise to form-birefringence. Furthermore, experimental results in from 75 GHz 110 show that proposed causes $\pi$/2 phase shift incident linearly polarized light with deviation optimal behaviour not exceeding 5% for entire range.
This contribution presents a concept of volumetric antenna scanner for the mm-wave frequency range. When being used as near-field scanner, high mechanical and electrical accuracy is required due to small wavelengths at frequencies. Possible solutions meet these requirements their impact on measurement uncertainty are discussed.
Abstract. In an intercomparison organized within the framework of German Calibration Service (Deutscher Kalibrierdienst – DKD), seven different calibration laboratories participated in measurement antenna factor for three antennas according to standards. Between August 2017 and April 2018, measurements have been performed on a hybrid antenna, logarithmic-periodic Open Ended Waveguide.