Prerana Chowdary Yerneni
Review paper summary: The main objective of this paper was to design a triple band equal split power divider circuit.
Introduction: With the advancement in technologies, concentrating on transceivers is increasing. Transceivers operate at various frequencies. The author uses Wilkinson power divider (using three section transmission line transformer) which operates at three different arbitrary frequencies simultaneously to generate the required specifications. This condition of using three different frequencies on contrary to using dual frequencies makes this /or made this paper publishable. This circuit operates in the frequency range 900 MHz - 2.3 GHz.
Design Concept: The frequencies of operation f1, f2 and f3 are chosen such that f1
Even-odd analysis of the Wilkinson is done and the values of corresponding impedances and lengths are found using the formulae given below:
The circuit is designed such that it provides good matching and isolation (by using three resistors) for the three frequencies selected by solving the simultaneous equations generated from:
Solving the above equation values of conductance from which values of resistors can be found. From the analysis the values obtained are presented in table 1.
Z1 Z2 Z3 R1 R2 R3 ϴ1 ϴ2 ϴ3
85.2 70.7 58.8 243 176 124 65.1 34.7 65.6
L1 L2 L3 W1 W2 W3 Z0 T H
37.8 19.9 37.17 1.3 1.93 2.71 50 0.017 1.57
Tabl...
... middle of paper ...
...igure 3: Conventional Wilkinson Power Divider Circuit Figure 4: Results for Conventional Circuit
Figure 5 :Proposed Triple band equal split 4 way Wilkinson power divider Design
Figure 6:Results for proposed design
Figure (i) : basic block diagram of 4 way Wilkinson power divider using 3 -2 port Wilkinson power dividers
References:
[1] M. Chongcheawchamnan, S. Patisang, S. Srisathit, R. Phromloungsri, and S. Bunnjaweht, “Analysis and design of a three-section transmission-line transformer,” IEEE Trans. Microw. Theory Tech., Vol. 53, no. 7, pp. 2458–2462, Jul. 2005.
[2] Microwave Engineering by David M. Pozar
[3] S. Srisathit, M. Chongcheawchamnan, and A. Worapishet,“Design and realization of a dual-band 3-dB power divider based on a two-section transmission-line topology,” Electron. Lett., Vol. 39, pp. 723–724, May2003.
The second method of measuring three phase power is the useful for both balanced and unbalanced loads. By connecting a wattmeter with its current probes in series with red phase and volt probes between red and yellow phase. The second wattmeter should be connected with its current probes in series with the blue phase and the volt probes between the blue and yellow phases. By adding these two values together there total power for the system can be
well as given a general understanding of the A-B-A design, as described in Royse, et al. VC was
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Basic Mathematics for Electronics seventh edition: Nelson M. Cooke, Herbert F.R Adams, Peter B. Dell, T. Adair Moore; Copyright 1960
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