Antenna impedance measurements in a magnetized plasma. I. Spherical antenna

2007 ◽  
Vol 14 (9) ◽  
pp. 092105 ◽  
Author(s):  
David D. Blackwell ◽  
David N. Walker ◽  
Sarah J. Messer ◽  
William E. Amatucci
Keyword(s):  
Magnetized Plasma ◽  
Impedance Measurements ◽  
Spherical Antenna ◽  
Antenna Impedance

Antenna Impedance Measures in a Magnetized Plasma. Part 1. Spherical Antenna

2006 ◽  
Author(s):  
David D. Blackwell ◽  
David N. Walker ◽  
Sarah J. Messer ◽  
William E. Amatucci
Keyword(s):  
Magnetized Plasma ◽  
Spherical Antenna ◽  
Antenna Impedance

Antenna impedance measurements in a magnetized plasma. II. Dipole antenna

2007 ◽  
Vol 14 (9) ◽  
pp. 092106 ◽  
Author(s):  
David D. Blackwell ◽  
David N. Walker ◽  
Sarah J. Messer ◽  
William E. Amatucci
Keyword(s):  
Dipole Antenna ◽  
Magnetized Plasma ◽  
Impedance Measurements ◽  
Antenna Impedance

Antenna input impedance: experimental confirmation and geological application

1988 ◽  
Vol 66 (9) ◽  
pp. 818-823 ◽  
Author(s):  
J. L. Nicol ◽  
P. V. Ridd
Keyword(s):  
Input Impedance ◽  
Theoretical Calculations ◽  
Experimental Confirmation ◽  
Dipole Antennas ◽  
Impedance Measurements ◽  
Field Surveys ◽  
The Earth ◽  
Antenna Impedance ◽  
Antenna Input

Calculations and measurements of the input impedance of horizontal dipole antennas close to the Earth have been carried out, and the results have been compared with those of other workers. Antenna impedance measurements over both very highly and very poorly conducting ground planes were found to be consistent with theoretical calculations. Finally, a series of measurements traversing an interface between basalt and weathered granodiorite, both covered with soil, indicated that antenna input-impedance measurements can be useful for geological field surveys.

The Use of Complementary Slots in Aircraft Antenna Impedance Measurements

1951 ◽  
Vol 39 (11) ◽  
pp. 1445-1448
Author(s):  
J. Bolljahin ◽  
J. N. Granger
Keyword(s):  
Impedance Measurements ◽  
Antenna Impedance

scholarly journals The Impedance Measurements Problem in Antennas for RFID Technique

2014 ◽  
Vol 21 (3) ◽  
pp. 509-520 ◽  
Author(s):  
Piotr Jankowski-Mihułowicz ◽  
Grzegorz Pitera ◽  
Mariusz Węglarski
Keyword(s):  
Operating Conditions ◽  
System Component ◽  
Network Analyzer ◽  
Antenna Synthesis ◽  
Indirect Measurements ◽  
Impedance Measurements ◽  
Estimated Parameters ◽  
Antenna Impedance ◽  
Impedance Parameters ◽  
Rfid Applications

Abstract The authors paid particular attention to the problem of antenna impedance measurements in the RFID technique. These measurements have to be realized by using two ports of a vector network analyzer and dedicated passive differential probes. Since the measurement process and estimated parameters depend on the frequency band, operating conditions, type of the system component and antenna designs used, appropriate verification of the impedance parameters on the basis of properly conducted experiments is a crucial stage in the antenna synthesis of transponders and read/write devices. Accordingly, a systematized procedure of impedance measurements is proposed. It can be easily implemented by designers preparing antennas for different kinds of RFID applications. The essence of indirect measurements of the differential impedance parameters is discussed in details. The experimental verification has been made on the basis of a few representative examples.

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