A small dual-frequency transformer in two sections
Top Cited Papers
- 8 April 2003
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 51 (4) , 1157-1161
- https://doi.org/10.1109/tmtt.2003.809675
Abstract
One of the most useful transmission-line constructs is the quarter-wave transformer that is used to impedance match a line at a single frequency f/sub 0/. The feasibility of an electrically small transformer with two sections and capable of achieving ideal impedance matching at two arbitrary frequencies is demonstrated analytically. To achieve this, the exact solution to the resulting transcendental transmission-line equations for two sections is obtained with no restrictions. The parameters of the transformer are presented in explicit closed form, and are exact. The results of this study are useful for a number of practical design problems, including dual-band antennas and RF circuits in general. In particular, feasibility of ideal operation at the important first harmonic frequency 2f/sub 0/ is demonstrated.Keywords
This publication has 5 references indexed in Scilit:
- A transformer of one-third wavelength in two sections - for a frequency and its first harmonicIEEE Microwave and Wireless Components Letters, 2002
- Field Theory of Guided WavesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1990
- Transmission-Line TransformersIEEE Transactions on Microwave Theory and Techniques, 1981
- A Method of Using Audio Signal-to-Noise Measurements to Obtain Criterion Contours for the Probability Scoring Model for Scoring Voice Communications ReceptionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1968
- General Synthesis of Quarter-Wave Impedance TransformersIEEE Transactions on Microwave Theory and Techniques, 1957