Broadband Antennas for the Double Quantum Well Terahertz Detector

This work is focused on realizing terahertz
detectors based on the idea of photon-assisted
tunneling (PAT) in the double electron layer
tunneling transistor (DELTT). The detector employs a
broadband antenna integrated lithographically with
the DELTT. The antenna should be broadband to take
full advantage of the electrically tunable
characteristic of the DELTT device. This work deals
with the analysis and design of broadband antennas
to efficiently couple THz radiation to the DELTT
device. Numerous bowtie and log-
periodic antenna structures have been designed and
simulated that have broadband impedance
characteristics. The electromagnetic simulator IE3D
is used to perform simulations. Measurements on
sample antennas were also performed to examine the
agreement between simulation and experimental
results. A key feature of this work is the
development of an equivalent circuit model for the
combined antenna and the DELTT device that could be
valid at THz frequencies. The development of such a
model is extremely important to match the antenna
impedance to the device impedance, which is key to
enhance the coupling efficiency.

Autorentext

Holds the degree of Ph.D. in Electrical Engineering from the University of New Mexico. In September of 2002, he joined the department of electrical engineering at Jordan University of Science and Technology. Dr Khodier is listed in Marquis who's who in science and engineering, who's who in the world, and is a senior member of the IEEE.

Klappentext

This work is focused on realizing terahertz detectors based on the idea of photon-assisted tunneling (PAT) in the double electron layer tunneling transistor (DELTT). The detector employs a broadband antenna integrated lithographically with the DELTT. The antenna should be broadband to take full advantage of the electrically tunable characteristic of the DELTT device. This work deals with the analysis and design of broadband antennas to efficiently couple THz radiation to the DELTT device. Numerous bowtie and log-periodic antenna structures have been designed and simulated that have broadband impedance characteristics. The electromagnetic simulator IE3D is used to perform simulations. Measurements on sample antennas were also performed to examine the agreement between simulation and experimental results. A key feature of this work is the development of an equivalent circuit model for the combined antenna and the DELTT device that could be valid at THz frequencies. The development of such a model is extremely important to match the antenna impedance to the device impedance, which is key to enhance the coupling efficiency.