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Theoretical and experimental study of 2.45 GHz rectifying antennas
| dc.creator | McSpadden, James Oliver | |
| dc.date.accessioned | 2012-06-07T22:32:52Z | |
| dc.date.available | 2012-06-07T22:32:52Z | |
| dc.date.created | 1993 | |
| dc.date.issued | 1993 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/ETD-TAMU-1993-THESIS-M175 | |
| dc.description | Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. | en |
| dc.description | Includes bibliographical references. | en |
| dc.description.abstract | This thesis presents a study on 2.45 GHz rectifying antennas (rectennas). The rectenna is a major component in a microwave power transmission system. The main feature is the conversion efficiency from microwave power to direct current (DC) power. Major circuit components of the rectenna element include the antenna, input and Output low pass filters, rectifying diode, and DC resistive load. Each component plays a vital role in maximizing the conversion efficiency. Thus, each component is reviewed separately. The rectifying diode is the key component in the rectenna circuit and understanding its characteristics is vital. A method has been devised to experimentally characterize a packaged GaAs Schottky barrier diode by inserting it in a microstrip test mount. The nonlinear equivalent circuit parameters of the diode are determined by a small signal test method. The method analyzes the diode's scattering parameters at various bias levels. A large signal measurement using the same test mount has also been configured to determine the power conversion efficiency from microwave to DC as well as determining the deembedded network impedance of the diode. A 85% conversion efficiency was achieved in the test mount when the diode was properly tuned. A small 6 element rectenna was manufactured, tested and flown onboard a Japanese sounding rocket in the first demonstration of a microwave power transmission system in space. The dual polarized rectenna was configured as a detector of microwave power. Test results and flight data from the Microwave Energy Transmission in Space (METS) experiment are given. Because the diode generates undesirable harmonic radiation, three frequency selective surfaces (FSSS) were designed to reduce the second harmonic radiation. Theoretical results agree fairly well with experiments for all these experiments. A FSS was tested with a 20 element rectenna which achieved a 10 dB suppression of the second harmonic and the conversion efficiency decreased less than 1%. | en |
| dc.format.medium | electronic | en |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en_US | |
| dc.publisher | Texas A&M University | |
| dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
| dc.subject | electrical engineering. | en |
| dc.subject | Major electrical engineering. | en |
| dc.title | Theoretical and experimental study of 2.45 GHz rectifying antennas | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | electrical engineering | en |
| thesis.degree.name | M.S. | en |
| thesis.degree.level | Masters | en |
| dc.type.genre | thesis | en |
| dc.type.material | text | en |
| dc.format.digitalOrigin | reformatted digital | en |
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