Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"Antenna Input Impedance"”.
-
An Investigation on the Effect of Ground Plane Roughness on Antenna Radiation Characteristics
… the performance of a thin-wire monopole antenna over both a flat ground plane and a randomly-varying rough surface. The Method of Moments with the Electric Field Integral Equation (EFIE) is used to account for all coupling interactions. Monte Carlo averaging is used to compute results …
-
Non-foster matching of an RFID antenna
… of radio-frequency identification (RFID) tag antennas with better matching characteristics to achieve extended range for passive tags have been investigated in the ultra-high frequency (UHF) band. A variety of cavitybacked/coupled microstrip dipole antennas in 915 MHz range were considered. …
-
UHF RFID Antenna Impedance Matching Techniques
… retail theft prevention. An RFID tag includes an antenna connected to a Radio Frequency Integrated Circuit (RFIC). RFID tags in the ultra-high frequency (UHF), industrial, scientific and medical (ISM) 902-928MHz band and global Electronic Product Code (EPC) 860‑960MHz band are powered passively …
-
Characteristic Modes for Impedance Matching and Broadbanding of Electrically Small Antennas
Antennas smaller than a quarter wavelength are fundamentally constrained in a variety of ways. One of the more problematic limitations is that the antenna's bandwidth declines sharply as the size of the antenna decreases. Myriad studies have sought antennas that perform close to the fundamental …
-
Development of Integrated "Chip-Scale" Active Antennas for Wireless Applications
… data networks (WLANs). Integrated microstrip antennas coupled directly to the RF electronics, offer potential advantages of low cost, reduced parasitics, simplified assembly and design flexibility compared to systems based on discrete antennas. However, the size of such antennas is governed by …
-
On the accuracy of estimating input impedance of probe-fed air-substrate microstrip patch antennas using the theory of characteristic modes
… modes are developed to estimate the input impedance of air-substrate, coaxial probe-fed, microstrip patch antennas with arbitrarily shaped patches. Such an antenna with an L-shaped patch is fabricated and experimentally measured, and a case study performed comparing the accuracy of …