Browsing by Author "Berge, Layne Albert"

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    An Electrically Small, Wireless Sensor Platform Designed for Arbitrary Orientation
    (North Dakota State University, 2013) Berge, Layne Albert
    Wireless sensors are currently used for data collection where it is either too dangerous and/or menial for a human to collect the data or impractical to use wired devices. Current wireless sensors are either too expensive or have too short of a battery life in order to be useful. The wireless sensor platform developed in this work solves these issues by using the RFID communications protocol. This allows for low-power communications while using inexpensive hardware. The sensor has been tested and shown to exhibit a near-isotropic radiation pattern, allowing the placement orientation to be uncontrolled. The antenna design exhibits two separate tuning mechanisms, allowing the antenna to be tuned for different UHF RFID ICs or different UHF RFID frequency spectrums. The wireless sensor platform currently is capable of taking temperature measurements and interfacing with additional sensor electronics via serial communications.
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    Tuning a Bowtie Slot Antenna with an Equation Based Curve for 900 and 2400 MHz ISM Bands
    (North Dakota State University, 2010) Berge, Layne Albert; Reich, Michael T.; Aziz, Masud A.; Braaten, Benjamin Davis
    A dual-band bowtie slot antenna is proposed and designed for the 900 and 2400 MHz ISM bands. Using Rogers 4003C substrate (εr = 3.55) with a thickness of 1.6 mm, the antenna is produced and tested. A comparison is made between measured and simulated data from both a Method of Moments and Finite-Element method software packages. By using a parabolic curve to form the sides of the bowtie slot, the new antenna integrates features from a Vivaldi antenna into its design. Using these features, the antenna achieves dual-band operation while maintaining an omni-directional pattern similar to a normal bowtie slot. The parabolic sides of this bowtie slot antenna offers an additional design element for other CPW fed slot antenna designs.