Graduation Year

2015

Document Type

Thesis

Degree

M.S.E.E.

Degree Name

MS in Electrical Engineering (M.S.E.E.)

Department

Electrical Engineering

Degree Granting Department

Electrical Engineering

Major Professor

Thomas M. Weller, Ph.D.

Committee Member

Gokhan Mumcu, Ph.D.

Committee Member

Stephen E. Saddow, Ph.D.

Keywords

3D printing, direct print additive manufacturing, fused deposition modeling, microwave filter, square open loop resonator

Abstract

Square open loop resonator (SOLR) bandpass filters fabricated with additive manufacturing techniques are presented and studied. One filter contains novel 3D capacitive plates used to enhance resonator coupling. The filters are centered at 2.45 GHz and loaded with capacitors for miniaturization as low as 21% that of a conventional SOLR bandpass filter. The pass-band insertion loss of the filters ranges from 3.8 dB to 5.5 dB and the 3 dB bandwidth ranges from 180 MHz to 250 MHz. Also, degradation in the effective conductivity of printed ink as a function of substrate roughness is analyzed. Finally, a study of dielectric and metallic 3D printing processes that are candidates for digital manufacturing of integrated mobile phone client antennas is presented.

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