Publications
May 2024 | Paper
Paving the Way to Terabit Wireless Telecommunications
Today, data has become a major part of the digital existence. The demand for faster, more reliable and ubiquitous connectivity has reached unprecedented heights.
May 2024 | Paper
Spectrum Unlimited
In the United States there are about 144,000 Telecom Towers. It is possible for a substantial number of them to be employed for both Fixed and Mobile Communications with very high data throughput speeds. The advantages of using wireless telecom towers are, high data speed, lower deployment cost, fast implementation and mobility.
June 2021 | Paper
Ultrabroadband 90° Hybrids: Part 1 Even-Mode Impedances
Tresselt has provided an equi-ripple, multi-octave 90-degree hybrid design capable of developing 90-degree hybrids exceeding 18:1 bandwidth with increased ripple. Application of four weighting correction methods to the Gibb’s phenomena extends the bandwidth of the 90-degree hybrids up to 120:1 with reduced ripple.
July 2021 | Paper
Ultrabroadband 90° Hybrids: Part 2 Performance
An extension of Tresselt’s(1) 90-degree hybrid theory introduces an improvement of bandwidth compared to the present theory. Using four weighting methods of Gibb’s phenomena reduction, low coupling ripples are achieved for a very wide bandwidth…
May 2013 | Paper
Simplify The Design Of Evanescent-Mode WG Filters
Filters are important components in many high-frequency systems, from commercial communications to electronic warfare (EW). A wide range of filters are useful at RF/microwave frequencies, including coaxial, cavity, stripline, microstrip, and waveguide configurations…
March 2019 | Paper
Multi-Beam Antennas: Increased Wireless Capacity with Enhanced Spectral Efficiency
In this paper, a 5GHz, 6-dual polarized beam system is presented. The system covers 90 degrees in the azimuth and was deployed at the Sky Tower in Auckland, New Zealand. Live data was gathered at street level and presented.
October 1989 | Paper
Evanescent Mode Filter: Design and Implementation
Filters are an integral part of any communication or electronic warfare system. They are used extensively in electronic countermeasures, electronic counter countermeasures, instrumentation, and terrestrial and satellite communications…
1996 | Paper
Beamformers: Broadband RF Technology For Integrated Networks
Beamformers are used in both radiation and reception of electromagnetic energy. Beamforming networks in antenna arrays shape beams and steer their direction electronically; requiring no mechanical motion…
April 1985 | Paper
Application of a statistical raindrop canting angle model on terrestrial and satellite links
Current interest in microwave propagation studies through precipitation particles has been prompted by proposals for terrestrial and satellite communication systems operating above 10 GHz…
1989 | Paper
High-Pass Directional Couplers using a Simple Linear Coupling Function
Wideband directional couplers are among the microwave components extensively used in electronic warfare, electronic countermeasures, and instrumentation. In this paper, a simple straight line coupling function is used to design a high-pass directional coupler…
September 1983 | Paper
A General Scattering Theory
A fundamentally different approach to the problems of electromagnetic wave propagation through a medium containing a distribution of scatterers is presented…
1984 | Paper
Crosspolarisation discrimination estimates for terrestrial and satellite paths using a statistical raindrop canting angle model
The statistical model developed by Howard (1,2) is applied to terrestrial and satellite links. Estimates of crosspolarisation discrimination values in both cases are calculated…
1979 | Paper
Crosspolarization of Microwaves due to Rain on a Satellite to Earth Path
The effect of rain on the crosspolarization of microwaves on a satellite to earth path has been investigated using a profile formula given by Smith [l]. It is shown that crosspolarization due to rain is less on a satellite to earth path than on an earth to earth one for the same path length.
1981 | Paper
A Statistical Raindrop Canting Angle Model
A mathematical model to predict accurately the mean and standard deviation of each drop-size canting angle, assuming Ganssian canting angle distributions, is presented…
Paper
Scattering Effects of Ice Needles in Satellite Communications
The scattering properties of ice needles are investigated with the help of Maxwell’s integral equations. The results are compared with the Rayleigh-Gans scattering…
Paper
A Novel Design for Microwave Linear Lossy Arrays
With the advent of microstrip technology, planar strip line and microstrip line array have started to gain more confidence in applications, although there are some reservations due to the ohmic losses where appear higher than the wave-guides…
Paper
A Statistical Canting Angle Model using Horizontal Wind Energy Spectra
A statistical model estimating the mean and standard deviation of each dropsize canting angle, assuming Gaussian canting angle distributions, is presented…