Evaluation of a colinear aerial array for feed-forward error correction (1975)
Type of ContentTheses / Dissertations
Thesis DisciplineElectrical Engineering
Degree NameMaster of Engineering
A vertical array of five colinear dipoles was built and tested at 104.8 MHz. It was hoped to confirm the feasibility of using an antenna array as the mixing network in a feed-forward corrected VHF amplifier capable of several kilowatts. The phasing and amplitude of each dipole had been calculated on a digital computer. It was predicted that this would give cancellation of the radiated signal in the far-field to a level of -50 dB over a 250 range of vertical angles. At the same time the array would provide an isolation of -15.6 dB between the Main and Subsidiary amplifiers. Testing involved design and construction of a network to drive the array with careful consideration of the errors introduced and their effect on the setting up of the array and on the field strength measurements. The resulting patterns of the array were close enouqh to the predicted ones for continued evaluation of the array to be worthwhile. The results were promising and it should be possible to further improve its performance.
RightsAll Right Reserved
Showing items related by title, author, creator and subject.
Wang, Xiaohan Sasha (University of Canterbury. Computer Science and Software Engineering, 2013)This thesis investigates four FEC (forward error correction) coding schemes for their suitability for a broadcast system where there is one energy-rich transmitter and many energy-constrained receivers with a variety of ...
Jeong, Inae; Kasturiarachi, Bathi; Park, Jungeun; Lumley, Thomas; Nardi, Elena; Sotardi, Valerie; Spooner, Kerri; Tisdell, Chris; Banks, John; Bartonicek, Adam; Bilgin, Ayse Aysin; Cameron, Rosie; Campbell, Anita L.; Collins, Julia; Craig, Tracy; Culling, Robert; D'Arcy-Warmington, Anne; Dekkers, Antony; Fijn, Paul; Gandell, Robyn; Sweatman, Catherine Hassell; Hillock, Poh; Intepe, Gizem; Jamieson-Lane, Alastair; Jennings, Michael; Kane, Phil; Khemane, Thabiso; Kim, Sang Hyun; Klymchuk, Sergiy; Kontorovich, Igor’; Lee, Yik Ching; Lindsay, Euan; Locke, Kim; Mahajan, Sania; Makhija, Anupam; Martinez-Luaces, Victor; Nijsse, Jeff; Oates, Greg; Passmore, Rachel; Plotz, Mariana; Campuzano, Juan Carlos Ponce; Renelle, Amy; Ricketts, Heather; Riegel, Kaitlin; Rupnow, Rachel; Shearman, Don; McGlynn, Susan; Stephenson, Jonny; Stewart, Sepideh; Tidwell, Will; Tsui, Terrence; Yang, Ching-Ching; Yoon, Caroline; Broering, Leonardo André; Rivera-Pérez, José Guadalupe; Smakovicz, Laís Fernanda; Evans, Tanya; Rizzolo, Douglas; Fijn, Paul; Budgett, Stephanie; Hayne, Judyth; Valckenborgh, Frank; Mokhithi, Mashudu; Craig, Tracy S.; Richardson, Steven; Adams, Nadine; Campuzano, Juan Carlos Ponce; Pettigrew, Jim; Goos, Merrilyn; Padayachee, Pragashni; Evans, Tanya; Greenwood, Sina; Robbins, Phil; Nijsse, Jeff; Evans, Tanya; Kontorovich, Igor'; Martinez, Paul Hernandez; Jha, Meena; Fernández-Plaza, Jose Antonio; Lee, Yik Ching; Evans, Tanya; Patel, Anne; Budgett, Stephanie; Evans, Tanya; Randazzo, Brooke; Rylands, Leanne; Intepe, Gizem; Anhalt, Cynthia; Khan, Nazim; Lin, Jenn-Tsann; Henning, Elisa; Gómez-Blancarte, Ana Luisa; Henning, Elisa; Maillardet, Robert; Rivera-Rodriguez, Claudia; Lin, Huan; Shock, Jonathan P.; Mofolo-Mbokane, Batseba L.; Brown, Justin; Dodd, Roland; Shearman, Don; Adams, Peter; Shaw, Corrinne; Murphy, Priscilla; Darragh, Lisa; Edwards, Antony; Richards, Deborah; Rico, Luis; Jones, Rhys; Stephens, Jason; Pettigrew, Jim; Kohler, Brynja; Morphett, Anthony; Wells, Anna; Padayachee, Pragashni; Afrifa-Yamoah, Eben; Hayes, Clinton; Rylands, Leanne; Stephens, Jason; Bilgin, Ayse; Armstrong, Lyn; Pingitore, Rosie; Harper, Rowena; Mullen, Claire; Thomas, Mike; Colbourn, Adelle; Garcia, Alba Santin; Cronin, Anthony; Tran, Trithang (2021)Ngā mihi aroha ki ngā tangata katoa and warm greetings to you all. Welcome to Herenga Delta 2021, the Thirteenth Southern Hemisphere Conference on the Teaching and Learning of Undergraduate Mathematics and Statistics. It ...
Hutchinson, Robert Edward John (University of Canterbury, 1967)This study is presented in three sections. Section I. The rates of reaction of the cyclic imines, aziridine to octamethylenimine, piperazine and occtahydro-1, 5-diazocine with p-fluoronitrobenzene in dimethylsulphoxide ...