Ultrawide Bandwidth <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-0.25198pt;width:38.849998px;" id="M1" height="17.2875" version="1.1" viewBox="0 0 38.849998 17.2875" width="38.849998">
	
		
			<g transform="matrix(.022,-0,0,-.022,.062,16.963)"><path id="x31" d="M384 0h-275v27q67 5 81.5 18.5t14.5 68.5v385q0 38 -7.5 47.5t-40.5 10.5l-48 2v24q85 15 178 52v-521q0 -55 14.5 -68.5t82.5 -18.5v-27z"></path></g><g transform="matrix(.022,-0,0,-.022,10.822,16.963)"><path id="x38" d="M249 635q70 0 116 -43t46 -105q0 -46 -28 -80q-22 -25 -80 -64q62 -35 97 -75t35 -99q0 -81 -63 -131t-135 -50q-83 0 -137.5 45.5t-54.5 123.5q0 52 45 95q29 28 89 64q-109 62 -109 155q0 66 50.5 115t128.5 49zM238 603q-42 0 -67.5 -31t-25.5 -72q0 -50 32.5 -79.5
t98.5 -62.5q61 48 61 124q0 59 -29.5 90t-69.5 31zM248 20q46 0 76.5 33.5t30.5 89.5q0 50 -39 85.5t-110 71.5q-81 -54 -81 -137q0 -67 35.5 -105t87.5 -38z"></path></g><g transform="matrix(.022,-0,0,-.022,21.582,16.963)"><path id="x30" d="M241 635q53 0 94 -28.5t63.5 -76t33.5 -102.5t11 -116q0 -58 -11 -112.5t-34 -103.5t-63.5 -78.5t-94.5 -29.5t-95 28t-64.5 75t-34.5 102.5t-11 118.5q0 58 11.5 112.5t34.5 103t64.5 78t95.5 29.5zM238 602q-32 0 -55.5 -25t-35.5 -68t-17.5 -91t-5.5 -105
q0 -76 10 -138.5t37 -107.5t69 -45q32 0 55.5 25t35.5 68.5t17.5 91.5t5.5 105t-5.5 105.5t-18 92t-36 68t-56.5 24.5z"></path></g>

			<g transform="matrix(.016,-0,0,-.016,32.338,6.2)"><path id="x2218" d="M326 255q0 -56 -41 -96t-99 -40t-99 40t-41 96t41 96t99 40t99 -40t41 -96zM274 255q0 38 -25.5 65t-62.5 27t-62.5 -27t-25.5 -65t25.5 -65t62.5 -27t62.5 27t25.5 65z"></path></g>

		
	
</svg>-Hybrid-Coupler in Planar Technology

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="486051.fig.001a" src="https://static.hindawi.com/articles/ijmst/volume-2014/486051/figures/486051.fig.001a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Feeding at <svg height="11.175" id="M14" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 10.2875 11.175" width="10.2875" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.113)"><path d="M570 168l-39 -168h-498v23l262 301l-248 304v22h471q4 -71 11 -146l-29 -4q-17 65 -37 88q-12 15 -36 20.5t-79 5.5h-181l211 -256l-243 -287h280q51 0 77 20.5t49 83.5z" id="x3A3"></path></g>
</svg>-port</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="486051.fig.001b" src="https://static.hindawi.com/articles/ijmst/volume-2014/486051/figures/486051.fig.001b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Feeding at <svg height="11.425" id="M15" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 11.025 11.425" width="11.025" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.363)"><path d="M600 0h-557v24l268 633l28 8l261 -641v-24zM497 50l-194 489l-196 -489h390z" id="x394"></path></g>
</svg>-port</td></tr></table></td></tr></table>

<table>Schematical electric field distribution in the coupler. The slot lines are enlarged to get a better understanding of the coupler’s principle.</table>

International Journal of Microwave Science and Technology

fig1

Figure 1

Figure 1: Ultrawide Bandwidth <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" style="vertical-align:-0.25198pt;width:38.849998px;" id="M1" height="17.2875" version="1.1" viewBox="0 0 38.849998 17.2875" width="38.849998">
	
		
			<g transform="matrix(.022,-0,0,-.022,.062,16.963)"><path id="x31" d="M384 0h-275v27q67 5 81.5 18.5t14.5 68.5v385q0 38 -7.5 47.5t-40.5 10.5l-48 2v24q85 15 178 52v-521q0 -55 14.5 -68.5t82.5 -18.5v-27z"></path></g><g transform="matrix(.022,-0,0,-.022,10.822,16.963)"><path id="x38" d="M249 635q70 0 116 -43t46 -105q0 -46 -28 -80q-22 -25 -80 -64q62 -35 97 -75t35 -99q0 -81 -63 -131t-135 -50q-83 0 -137.5 45.5t-54.5 123.5q0 52 45 95q29 28 89 64q-109 62 -109 155q0 66 50.5 115t128.5 49zM238 603q-42 0 -67.5 -31t-25.5 -72q0 -50 32.5 -79.5
t98.5 -62.5q61 48 61 124q0 59 -29.5 90t-69.5 31zM248 20q46 0 76.5 33.5t30.5 89.5q0 50 -39 85.5t-110 71.5q-81 -54 -81 -137q0 -67 35.5 -105t87.5 -38z"></path></g><g transform="matrix(.022,-0,0,-.022,21.582,16.963)"><path id="x30" d="M241 635q53 0 94 -28.5t63.5 -76t33.5 -102.5t11 -116q0 -58 -11 -112.5t-34 -103.5t-63.5 -78.5t-94.5 -29.5t-95 28t-64.5 75t-34.5 102.5t-11 118.5q0 58 11.5 112.5t34.5 103t64.5 78t95.5 29.5zM238 602q-32 0 -55.5 -25t-35.5 -68t-17.5 -91t-5.5 -105
q0 -76 10 -138.5t37 -107.5t69 -45q32 0 55.5 25t35.5 68.5t17.5 91.5t5.5 105t-5.5 105.5t-18 92t-36 68t-56.5 24.5z"></path></g>

			<g transform="matrix(.016,-0,0,-.016,32.338,6.2)"><path id="x2218" d="M326 255q0 -56 -41 -96t-99 -40t-99 40t-41 96t41 96t99 40t99 -40t41 -96zM274 255q0 38 -25.5 65t-62.5 27t-62.5 -27t-25.5 -65t25.5 -65t62.5 -27t62.5 27t25.5 65z"></path></g>

		
	
</svg>-Hybrid-Coupler in Planar Technology 

International Journal of Microwave Science and Technology

Ultrawide Bandwidth -Hybrid-Coupler in Planar Technology

Figure 1