Slow Wave Structures

Abstract

The sections in this article are Guided Waves and Waveguides Fundamentals of Slow‐Wave Structures A Brief History of Slow‐Wave Development Basic Theory of Slow‐Wave Structure (ω − β) Dispersion Diagram and Slow‐Wave Parameters Approximate and Quasi‐Static Models Accurate and Hybrid‐Mode Field Models Slow‐Wave Summary and Applications

Compact coplanar waveguide power splitter with filtering capability based on slow‐wave structures

“…Slow‐wave transmission lines are artificial lines typically consisting of a host line periodically loaded with reactive elements . The presence of reactive elements, for example, shunt‐connected capacitances, series‐connected inductances, or a combination of both reactive elements, decreases the phase velocity of the line (slow‐wave effect), thereby shortening the wavelength of the propagating signals.…”

“…Most slow‐wave artificial lines and the corresponding (compact and eventually harmonic suppressed) microwave circuits have been implemented in microstrip technology, and only few of them have been designed and fabricated in coplanar waveguide (CPW) technology . In Ref.…”

“…Slow-wave transmission lines are artificial lines typically consisting of a host line periodically loaded with reactive elements. 1,2 The presence of reactive elements, for example, shuntconnected capacitances, [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] series-connected inductances, [18][19][20][21][22] or a combination of both reactive elements, [23][24][25][26][27] decreases the phase velocity of the line (slow-wave effect), thereby shortening the wavelength of the propagating signals. Therefore, these slow-wave artificial lines are useful for device miniaturization, as, for a required electrical length (dictated by design specifications), the physical length of such lines is shorter than the one of their ordinary counterparts.…”

“…[31][32][33][34][35][36][37][38] Most slow-wave artificial lines and the corresponding (compact and eventually harmonic suppressed) microwave circuits have been implemented in microstrip technology, 8,9,11,14,[16][17][18]22,26,33,34 and only few of them have been designed and fabricated in coplanar waveguide (CPW) technology. 1,20,25 In Ref. 25, slow-wave CPW transmission lines based on simultaneous capacitive and inductive loading were reported.…”

Compact power splitter with harmonic suppression based on inductively loaded slow‐wave transmission lines

“…Slow‐wave transmission lines are artificial lines exhibiting small phase velocity, as compared to ordinary lines . Typically, these lines have been implemented by periodic loading of a host line with shunt capacitors .…”