Modeling of Coaxial Slot Waveguides Using Analytical and Numerical Approaches: Revisited

<table>Comparison of (a) normalized resistance, <svg height="17.4175" id="M131" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 48.146252 17.4175" width="48.146252" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>, and (b) normalized reactance, <svg height="17.4175" id="M132" style="vertical-align:-3.39066pt" version="1.1" viewbox="0 0 50.662498 17.4175" width="50.662498" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g transform="matrix(NaN,0,0,NaN,NaN,NaN)"><path d="M135 536q-20 0 -35 15.5t-15 35.5q0 22 15 37t36 15t35.5 -15t14.5 -37q0 -21 -15 -36t-36 -15zM252 0h-220v26q48 5 59 17t11 63v206q0 47 -9 58t-54 18v24q78 12 142 39v-345q0 -51 11.5 -63t59.5 -17v-26z" id="x69"></path></g><g transform="matrix(NaN,0,0,NaN,NaN,NaN)"><path d="M524 0h-209v26q44 5 55 18t11 65v167q0 114 -91 114q-50 0 -109 -51v-235q0 -50 10 -61.5t55 -16.5v-26h-217v26q51 5 62 17t11 61v206q0 47 -9.5 58.5t-50.5 19.5v23q82 15 139 40v-79l67 47q47 30 83 30q60 0 94.5 -40t34.5 -112v-193q0 -50 10 -61.5t54 -16.5v-26z
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</svg>, for air at 25°C by considering size of monopole driving from coaxial line with <svg height="12.345" id="M133" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 57.622501 12.345" width="57.622501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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t96 -62.5q53 0 78 45.5t25 105.5q0 68 -35 116t-99 48z" id="x36"></path></g><g transform="matrix(NaN,0,0,NaN,NaN,NaN)"><path d="M153 550l-26 -186q79 31 111 31q90 0 141.5 -51t51.5 -119q0 -93 -89 -166q-85 -69 -173 -71q-32 0 -61.5 11.5t-41.5 23.5q-18 17 -17 34q2 16 22 33q14 9 26 -1q61 -50 124 -50q60 0 93 43.5t33 104.5q0 69 -41.5 110t-121.5 41q-53 0 -102 -20l38 305h286l6 -8
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</svg> mm, <svg height="13.5525" id="M134" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 56.993752 13.5525" width="56.993752" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(NaN,0,0,NaN,NaN,NaN)"><path d="M452 333q0 -82 -46 -164t-116 -128q-81 -53 -158 -53q-26 0 -51 13t-37 32q-26 41 -6 134l91 431q7 40 2.5 47t-34.5 7h-33l2 25q36 4 72.5 13t58.5 15.5t28 6.5q10 0 4 -29l-91 -391h2q65 77 130 116.5t105 39.5q36 0 56.5 -32t20.5 -83zM365 316q0 76 -35 76
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</svg> mm, and <svg height="13.5525" id="M135" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 65.951248 13.5525" width="65.951248" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> mm.</table>

International Journal of Antennas and Propagation

fig7

Figure 7

Figure 7: Modeling of Coaxial Slot Waveguides Using Analytical and Numerical Approaches: Revisited 