ECE549_M3L2

ECE549_M3L2 - M3 L2 1 NC STATE UNIVERSITY ECE549 RF Design...

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M3 L2 1 NC STATE UNIVERSITY © M. B. Steer, 2001–8 ECE549 RF Design for Wireless Professor Michael Steer http://www4.ncsu.edu/~mbs MODULE 3 LECTURE 2 Coupled Line Applications Chapter 7, Sections 7.6–7.11
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M3 L2 2 NC STATE UNIVERSITY © M. B. Steer, 2001–8 Goals • Intuitive revisit of coupled lines • Design of Coupled Lines • Other Coupled Lines – Lange Coupler (3 dB coupler) – Shielded coupled lines – Hybrid (augmented with lumped elements)
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M3 L2 3 NC STATE UNIVERSITY © M. B. Steer, 2001–8 Fields on Coupled Lines
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M3 L2 4 NC STATE UNIVERSITY © M. B. Steer, 2001–8 Best Way to Describe Fields SUPERPOSTION HOLDS EVEN ODD
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M3 L2 5 NC STATE UNIVERSITY © M. B. Steer, 2001–8 C 11 and C 22 are called self-capacitances, C S C 12 is called mutual capacitance, C m If the two strips have the same width C 11 = C 22 = C S Even mode L e and C e Odd mode L o and C o So Z 0 and v P will be different for the two modes
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L2 6 NC STATE UNIVERSITY © M. B. Steer, 2001–8 Coupled Microstrip Lines So, what are the implications for coupled lines? 0 L
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This note was uploaded on 09/24/2009 for the course ECE 549 taught by Professor As during the Fall '09 term at N.C. State.

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ECE549_M3L2 - M3 L2 1 NC STATE UNIVERSITY ECE549 RF Design...

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