At lower relative (i.e., non-dimensional) frequencies, four propagating waves exist in fluid-filled pipes. Each of these waves carries energy in the pipe wall, while three waves carry energy in the fluid as well. The otherwise fairly complex dispersion laws for waves in pipes simplify in the frequency region considered to simple rodand beam-type laws. It is shown that these laws can be determin...

A superconducting slot antenna combined with a bandpass filter composed of coplanar waveguide meanderline resonators has been designed and tested. Based on a new design theory for broadband impedance matching circuits, we designed a slot antenna with a small radiation resistance of 1 X impedance matched to a three-pole Chebyshev bandpass filter with 10 GHz center frequency and 0.35% fractional ...

In this paper, a metal-clad planar optical waveguide biosensor with five layer structure is studied theoretically for the detection of Pseudomonas and Pseudomonas-like bacteria. Using a very simple boundary matching technique, we derive the mode equation and other necessary formulae for the proposed biosensor and analyse its performance under different conditions related to its constituents. Th...

M. Simoen, C. W. S. Chang, P. Krantz, Jonas Bylander, W. Wustmann, V. Shumeiko, P. Delsing, and C. M. Wilson Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, G€ oteborg SE-412 96, Sweden Institute for Quantum Computing and Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada Laboratory for Physical Sc...

This work describes the application of two different test structures to execute broadband microwave measurements of the dielectric constant of ceramic thin films. Coplanar waveguide probes and vector network analyzer were used to measure the dielectric constant versus frequency of thin films of lead zirconate titanate and zirconium titanate, fabricated by sol gel methods. One-step lithography w...

Electrostatic discharge (ESD) protection devices can have an adverse effect on the performance of high frequency and RF circuits. This work presents for the first time, an s-parameter based analysis of the performance of RF circuits with various ESD protection designs. Additionally, a design methodology for distributed ESD protection using coplanar waveguides is developed to achieve a better im...

This paper presents a coplanar waveguide fed rectangular slot antenna tuned by a patch stub. The presented antenna has 98% impedance bandwidth, and 6 dB average gain. The antenna can be used in phased array applications with more than 61% usable bandwidth.

Nonspecific surface binding of small protein molecules presents a major obstacle to surface biosensing techniques attempting to detect very low concentrations ( 1 pg/mm) of large biological objects such as cells and bacteria. A new method for selective desensitization of a polarimetric waveguide interferometer eliminates the background noise from nonspecific surface binding. We demonstrate the ...