## Search

Now showing items 1-9 of 9

#### Constant radiation characteristics for log-periodic dipole array antennas

(Institute of Electrical and Electronics Engineers, 2014)

Given the correct terminal voltages on each element of a log-periodic dipole array constant radiation characteristics can be achieved for an omni-directional radiation pattern. In this communication it is shown that this ...

#### Fast parametric modeling of radio astronomy reflector antenna noise temperature

(Institute of Electrical and Electronics Engineers, 2016)

This communication presents an approximate method to rapidly estimate the antenna noise temperature of
a reflector antenna system as a function of the geometric parameters describing the reflector dishes. The initial ...

#### Modeling of the radiation pattern of a pair of thin circular-arc dipoles over an infinite ground plane

(Institute of Electrical and Electronics Engineers, 2013)

This communication presents a model of the radiation pattern of two circular-arc dipoles above an infinite perfectly electrically conducting ground plane. A Fourier expansion is used to describe the currents on the wires, ...

#### Parametric modeling of radiation patterns and scattering parameters of antennas

(Institute of Electrical and Electronics Engineers, 2016)

This paper describes a data-driven method to model the radiation patterns (over a large angular region) and scattering parameters of antennas as a function of the geometry of the antenna. The radiation pattern model consists ...

#### Rapid calculation of antenna noise temperature in offset Gregorian reflector systems

(Institute of Electrical and Electronics Engineers, 2015)

Antenna noise temperature calculations of reflector systems is often a slow process and makes direct optimization of the sensitivity of these systems a difficult and time consuming task. This paper presents an improvement ...

#### Analysis and design of conical transmission line power combiners

(Stellenbosch : University of Stellenbosch, 2007-12)

This dissertation presents a technique for the design of N-way conical line power combiners,
which offers significant advantages over existing axially symmetric combining techniques.
A full analytical study of conical ...

#### Multivariate adaptive sampling of parameterized antenna responses

(Institute of Electrical and Electronics Engineers, 2017)

ENGLISH ABSTRACT: We present a robust method to adaptively construct
parameterized models of the full radiation patterns of antennas
and the associated S-parameters. The method sequentially selects
points (geometric ...

#### Prediction of aperture efficiency ripple in clear aperture offset Gregorian antennas

(Institute of Electrical and Electronics Engineers, 2013)

ENGLISH ABSTRACT: Electrically small clear aperture dual offset reflector systems often exhibit a directivity ripple over frequency due to the interference of the diffracted field from the sub-reflector with the main beam ...

#### Compact conical line power combiner design using circuit models

(Institute of Electrical and Electronics Engineers, 2014)

ENGLISH ABSTRACT: A simple equivalent circuit model with empirical equations describing the peripheral feeding ports of conical line power combiners is presented. The model allows the entire structure to be designed using ...