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Browsing School of Engeneering Science and Technology by Author

Browsing School of Engeneering Science and Technology by Author "Musyoki, Stephen"

Now showing items 1-13 of 13

Analysis of Electromagnetic Field Radiation from a Rectangular Cavity-Backed Slot Antenna Using ADI-FDTD Method

Musyoki, Stephen; Ouma, Heywood A.; K’Onditi, Dominic B.O.; Nyaory, George M. (2012)

In this paper, a rectangular Cavity Backed Slot Antenna (CBSA) Model excited by a probe is investigated. The analysis is carried out using the Alternating Direction Implicit - Finite Difference Time Domain (ADI-FDTD) Method ...
Auto-resonant eniotron oscillator using a magnetron type cavity

Musyoki, Stephen; Yokoo, Kuniyoshi; Sato, Nobuyuki; Ono, Shoichi (1991)

In an ideal auto-resonant eniotron oscillator (ARPO), all the electrons are able to give almost all their kinetic energy to an electromagnetic wave, resulting in a conversion efficiency of nearly 100%. However, the electric ...
Auto-resonant peniotron amplifier with a down tapered DC magnetic field

Musyoki, Stephen; Yokoo, Kuniyoshi; Sato, Nabuyi; Ono, Shoichi (Taylor & Francis, 1990-02)

High efficiency operation of an auto-resonant peniotron amplifier operating with a down tapered DC magnetic field is discussed and the basic design concepts for a 200 GHz experimental prototype tube are described.
Bit Error Rate Performance Analysis of a Wideband Code Division Multiple Access System Model in an Indoor Environment using Convolution Coding over Additive White Gaussian Channel

Musyoki, Stephen; Kibet, Philip; Ombongi, Filbert (Volume 3, Issue 5 October 2014, 2014)

The research entails the development of a WCDMA system model in an indoor environment that transmits data over an Additive White Gaussian Noise channel. In this environment the data rate is taken as 2Mbps. The performance ...
Design of a high power, 10 GHz auto-resonant peniotron amplifier

Musyoki, Stephen; Sakamoto, Keishi; Watanabe, Akihiko (1992)

The autoresonant peniotron amplifier is a suitable source of high power RF radiation because of its high gain, high power, high frequency and high efficiency operation features. In this report we present our simulation ...
Design of a high power, 2.75 GHz relativistic peniotron oscillator

Musyoki, Stephen; Sakamoto, Keishi; Watanabe, Akihiko (1992-10)

In the peniotron oscillator, the kinetic energy of relativistic electrons can be efficiently converted to an electromagnetic wave. This feature makes the peniotron a very attractive source of high power microwaves, which ...
The Effects of a Human Hand on a Wireless Mouse Antenna

Musyoki, Stephen; Konditi, B. O.; Njoroge, Dominic; Rainsford, K (2015)

In this paper, Finite Difference Time Domain (FDTD) method is used to analyze the effect of a human hand on a wireless mouse antenna. The need for this analysis is based on the fact that human tissues are dielectric in ...
Emittance measurement of high-brightness microbeams

Musyoki, Stephen; Ishizuka, Hiroshi; Nakahara, Yuriko; Kawasaki, Sunao; Shimizu, Hiroshi; Watanabe, Akihiko; Shiho, Makoto (Japanese Journal of Applied Physics, 1994)

Arrays of microtriodes have recently become available due to the development of microfabricated field-emission electron sources. Computer simulation has shown that the brightness of beams emitted by them is significantly ...
Improving the Bandwidth of a Circular Microstrip Patch Antenna through Shape Modification

Langat, Benard Kipkorir; Langat, Kibet P; Musyoki, Stephen (2014)

An antenna is used in a communication system to radiate or receive radio waves. The most desired antenna is one which is small in size, light in weight, cheap and can easily fit to the surface attached. All these features ...
A new method of emittance measurement for electron beams from the Micro-emitter

Ishizuka, Hiroshi; Nakahara, Yuriko; Kawasaki, Sunao; Musyoki, Stephen; Shimizu, Hiroshi; Watanabe, Akihiko; Shiho, Makoto (1994)

Recently a new type of cathode called Micor-emitter has been put in progress. This cathode is a microfabricated field emitter having the characteristics of very low emittance and high brightness. We cannot measure the ...
Performance Analysis of a WCDMA System Model in a Low Mobility and Indoor Environment with Channel Coding over Additive White Gaussian Noise Channel

Musyoki, Stephen; Ombongi, Filbert; Kibet, Philip L. (2015)

This paper has analyzed the performance a Wireless Division Multiple Access (WCDMA) system model at a data rate of 384kbps and 2Mbps over an Additive White Gaussian Noise (AWGN) channel. The signal was modulated by Quadrature ...
Radar Waveform Generation and Optimization based on Rossler Chaotic System

Musyoki, Stephen; Nyakoe, George; Obadha, Joseph (2012)

The concept of Multiple-Input Multiple-Output (MIMO) radars has drawn considerable attention recently. Unlike the traditional Single-Input Multiple-Output (SIMO) radar which emits coherent waveforms to form a focused beam, ...
Simulation of the influence of secondary electrons on the performance of potential depressed collectors for TWTs

Musyoki, Stephen; Takahashi, M; Uchikawa, T (2000)

Significant differences have been found between measured and simulated data for collectors designed with codes which disregard the influence of secondary electrons. To solve this problem, various codes have been developed. ...

Browsing School of Engeneering Science and Technology by Author "Musyoki, Stephen"

Browsing School of Engeneering Science and Technology by Author "Musyoki, Stephen"

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