Search
Results
-
Finite-volume Maxwellian absorber on unstructured Grid
(2006)2006 IEEE MTT-S International Microwave Symposium DigestA novel finite-volume time-domain (FVTD) model for the Maxwellian absorber is presented to aid numerical simulations on unstructured grid. In the present approach all the electromagnetic (EM) field quantities are co-located in both space and time. Theoretical development of the co-located FVTD formulation and a practical application of the Maxwellian absorber as an unsplit perfectly matched layer (PML) for waveguide problems are presented. ...Conference Paper -
Continuous Tunable Phase Shifter Based on Injection Locked Local Oscillators at 30 GHz
(2006)2006 IEEE MTT-S International Microwave Symposium DigestInjection locking is used to achieve a continuous tunable phase shift over 280deg at 30 GHz. By locking a free running VCO at 15 GHz to an external reference source and doubling the output signal a very linear phase tuning range can be achieved. A phase noise of -117 dBc/Hz and -140 dBc/Hz at 100 KHz and 1 MHz offset frequency, respectively, have been measured. The prototype phase shifter is build on high epsiv r = 10.2 RT/Duroid substrate ...Conference Paper -
A detailed investigation of UTC traveling wave photodetectors
(2006)2006 IEEE MTT-S International Microwave Symposium DigestEffects of the absorber's thickness on the UTC TWPD's performance are investigated. This is an important parameter because it affects both external efficiency and the bandwidth of the device. The analysis of the photodetectors is done using a hybrid drift-diffusion-TLM method, which takes into consideration both, carrier dynamics and RF propagation characteristics. To improve the external efficiency of the UTC TWPD, a thicker absorber is ...Conference Paper -
An LTCC-based Wireless Transceiver with Integrated Optical Interface
(2006)2006 IEEE MTT-S International Microwave Symposium DigestThis paper describes the realization of an LTCC based optical wireless-transceiver using radio-over-fiber (RoF) techniques. For the first time, single mode optical fibers are employed, making this device particularly attractive for indoor and outdoor distributed antenna systems. The operating frequencies are in the 5-6 GHz band.Conference Paper -
Progress of the Finite-Volume Method in Time Domain (FVTD) and in Frequency Domain (FVFD)
(2006)Conference Paper -
Compact reduced order models for microwave filter optimization
(2006)ACES 2006: Advances in Computer-Aided Design of Electromagnetic Structures and DevicesConference Paper -
Model order Reduction for a field averaging finite-volume scheme
(2006)2006 IEEE MTT-S International Microwave Symposium DigestIn this work the applicability of model order reduction schemes to models that are obtained through finite-volume space discretizations is examined. While some state-space formulations of this method fail to allow the efficient generation of reduced order models, the application to a 2-dimensional field-averaging version that has recently been developed yields excellent results in terms of both accuracy and computational efficiency. This ...Conference Paper -
A Compact LTCC Butler Matrix Realization for Phased Array Applications
(2006)2006 IEEE MTT-S International Microwave Symposium DigestThis paper describes a novel realization for a 8times8 Butler matrix centered at 5 GHz. The structure is implemented in LTCC (low-temperature-cofired-ceramics) and is part of a beamforming network for radiometer application.Conference Paper -
Design of Filters Based on Photonic Crystal Slabs
(2006)International Conference on Mathematical Methods in Electromagnetic Theory, 2006 : [MMET 06 ; June 26 - 29, 2006, Kharkiv, Ukraine ; conference proceedings ; part of Kharkiv Electromagnetics & Photonics Week 2006]Conference Paper -
Parameters extraction from Inhomogeneous metamaterials with Model Based Parameter Estimation
(2006)International Conference on Mathematical Methods in Electromagnetic Theory, 2006 : [MMET 06 ; June 26 - 29, 2006, Kharkiv, Ukraine ; conference proceedings ; part of Kharkiv Electromagnetics & Photonics Week 2006]Conference Paper