We explore, both experimentally and theoretically, the existence in the millimeter-wave range of the phenomenon of extraordinary light transmission through arrays of subwavelength holes. We have measured the transmission spectra of several samples made on aluminum wafers by use of an AB Millimetre quasi-optical vector network analyzer in the wavelength range 4.2-6.5 mm. Clear signals of the exi...

Linear and nonlinear device models are the building blocks of most RF and microwave designs. S-parameters are often used to represent linear devices. As a “black-box” model, they can easily be obtained using a vector network analyzer and distributed for simulation. S-parameters use superposition to equate the linear relationship between incident and refl ected waves at all of the device’s ports...

Two techniques are commonly used to measure NF: the Y-factor method and the cold-source method. The Y-factor or hot/ cold-source method is the predominant approach and is most commonly implemented with noise-figure analyzers and spectrum analyzer-based solutions. In contrast, the cold-source method is usually performed using vector network analyzers (VNAs), which provide magnitude and phase inf...

Coplanar wave guide (CPW) inter digital capacitor (IDC) configurations on printed circuit board (PCB) and parametric variations over frequency are studied by simulation using ADS Momentum. The structures are fabricated in printed circuit board using PCB fabrication techniques. The scattering parameters of the structure are measured using vector network analyzer (VNA). The capacitance is estimat...

This article presents the design and development of a personal computer based controller for a microwave tomographic system for breast cancer detection. The system uses motorized, dual-polarized antennas and a custom-made GUI interface to control stepper motors, a wideband vector network analyzer (VNA) and to coordinate data acquisition and archival in a local MDSPlus database. Both copolar and...

This paper presents a complete network analyzer development for network delay in campus environment. The purpose of this study is to define the accuracy of network analyzer development with independent data, real network and OPNET simulation tool. The network delay will measure based on transmission delay and propagation delay. This network analyzer software will test on delay generated by the ...

Trees are one of the most useful plants for life on earth. However, trees can be harmful due to cavities in stem sections. Rapid detection is needed prevent several losses that may arise fallen trees. This research identified a hollow and non-hollow tree section flamboyant with sub-surface radar system. The sub surface system was modeled using Vector Network Analyzer (VNA) connected Vivaldi ant...