Optimum number of antenna elements in a sub-array for highest G/T

Date

1998-06-26

Author

Demir, S

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

177
views

0
downloads

There are a number of different parallel arm feed topologies which give the same radiation pattern characteristics. On the of her hand, noise temperature and efficiency of those feed structures will possibly, be not the same. In this wort parallel arm feed structures are studied for their noise and efficiency performance using the noise equivalent line length method and an optimum number of antenna elements for a sub-array is obtained by comparing noise temperature and efficiencies of the structures.

Subject Keywords

Antenna feeds, Temperature, Topology, Antenna radiation patterns

URI

https://hdl.handle.net/11511/64183

DOI

https://doi.org/10.1109/aps.1998.702164

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Pattern reconfigurable antenna designs insub-6 ghz band for 5g applications Çelik, Feza Turgay; Aydın Çivi, Hatice Özlem; Alatan, Lale; Department of Aerospace Engineering (2021-2-08) In this thesis, design,simulations,fabrication, and radiation pattern measurementsof reconfigurable antennas for sub-6GHz application of 5G protocol are presented. Modeanalysis techniquesand array theory areemployed to have anunderstanding ofthe pattern reconfigurability conceptof the designs.As a first step, adual-fed rectangular patch antenna is designed,simulated,fabricated,and then measured. Even and odd mode definitions onthe rectangular patch antennas are employed in the design pr...
Frequency Selective Characteristics of a Plasma Layer with Sinusoidally Varying Electron Density Profile GÜREL, ÇİĞDEM SEÇKİN; Oencue, Emrah (Springer Science and Business Media LLC, 2009-06-01) In this study reflection, absorbtion and transmission characteristics of a plasma layer having sinusoidally varying electron number density are analysed. In the analysis, plasma layer is divided into thin subslabs with constant electron number densities. The general frequency selective behavior of the plasma is investigated by varying the plasma parameters, external magnetic field excitation and sinusoidal electron distribution in order to be used in recent plasma applications.
Wideband omnidirectional and sector coverage antenna arrays for base stations Alatan, Lale (2018-01-01) By using parallel strip line fed printed dipole antennas as array elements, an omnidirectional antenna array and a wide angle sector coverage array operating in octave band are designed. A maximum deviation of ±1.25 dB from the omnidirectional pattern is achieved for the omnidirectional array, and the average gain of the antenna was measured as being 5 dB in the 1.35–2.7GHz band. For the sector coverage array, a special reflector design is utilized to maintain a half power beam width of around 115◦ with a s...
Design of Irregularly Shaped Patch Antennas by using the Multiport Network Model Sener, Goker; Alatan, Lale; Kuzuoğlu, Mustafa (2008-07-11) The multiport network model (MNM) is an analytical method that is used to analyze microstrip antennas. MNM is based on defining ports along the periphery of the patch and evaluating the impedance matrix corresponding to these ports by using the Greenpsilas function for the cavity under the patch. For regular rectangular, triangular and circular patches, analytical expressions for the Greenpsilas function are available. In the analysis of irregular patches, Greenpsilas functions cannot be calculated explicit...
Multiscale Modeling of Thin-Wire Coupling Problems Using Hybridization of Finite Element and Dipole Moment Methods and GPU Acceleration ÖZGÜN, ÖZLEM; Mittra, Raj; Kuzuoğlu, Mustafa (2020-01-01) In this article, a hybrid numerical method, called finite element method (FEM) + dipole moment (DM), is presented for efficient solution of multiscale electromagnetic radiation and scattering problems that involve structures with fine features, such as thin-wire antennas or objects. In this method, the FEM is hybridized with the DM approach to help ease certain computational burdens, such as mesh refinement, ill-conditioning, memory overload, and long computation times, when solving multiscale problems with...

Citation Formats

S. Demir, “Optimum number of antenna elements in a sub-array for highest G/T,” 1998, p. 1192, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64183.