Can <svg style="vertical-align:-0.288pt;width:29.6875px;" id="M1" height="15.6375" version="1.1" viewBox="0 0 29.6875 15.6375" width="29.6875"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,15.6375)">
		<g transform="translate(72,-59.49)">
			<text transform="matrix(1,0,0,-1,-71.95,59.83)">
				<tspan style="font-size: 17.93px; " x="0" y="0">𝜆</tspan>
				<tspan style="font-size: 17.93px; " x="9.7017527" y="0">/</tspan>
				<tspan style="font-size: 17.93px; " x="14.687127" y="0">4</tspan>
			</text>

		</g>
	</g>
</svg> Radiators Be Really Isotropic?

<table>The double U-shaped radiator. This radiator is composed of two U-shaped radiators, one radiator is rotated by <svg height="14.85" id="M116" style="vertical-align:-2.22495pt" version="1.1" viewbox="0 0 25.3375 14.85" width="25.3375" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,0,0,-.017,.062,12.013)"><path d="M574 449q-23 -58 -38 -79q-16 -4 -79 -4q-27 -100 -46 -219q-14 -87 7 -87t74 36l13 -27q-74 -81 -139 -81q-48 0 -48 62q0 22 8 59l60 258l-154 4q-21 -103 -54.5 -209t-64.5 -151q-38 -23 -83 -23l-7 15q46 36 94 152.5t64 216.5q-81 0 -138 -54l-18 23q22 27 39.5 43
t61.5 33.5t100 17.5q43 0 131.5 -2.5t129.5 -2.5q23 0 33.5 5t24.5 25z" id="x1D70B"></path></g><g transform="matrix(.017,0,0,-.017,10.109,12.013)"><path d="M368 703l-264 -866h-60l265 866h59z" id="x2F"></path></g><g transform="matrix(.017,0,0,-.017,17.112,12.013)"><path d="M412 140l28 -9q0 -2 -35 -131h-373v23q112 112 161 170q59 70 92 127t33 115q0 63 -31 98t-86 35q-75 0 -137 -93l-22 20l57 81q55 59 135 59q69 0 118.5 -46.5t49.5 -122.5q0 -62 -29.5 -114t-102.5 -130l-141 -149h186q42 0 58.5 10.5t38.5 56.5z" id="x32"></path></g>
</svg> radians in the azimuth relative to the second U-shaped radiator, and the phase difference between the currents of the two radiators is <svg height="14.85" id="M117" style="vertical-align:-2.22495pt" version="1.1" viewbox="0 0 25.3375 14.85" width="25.3375" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,0,0,-.017,.062,12.013)"><path d="M574 449q-23 -58 -38 -79q-16 -4 -79 -4q-27 -100 -46 -219q-14 -87 7 -87t74 36l13 -27q-74 -81 -139 -81q-48 0 -48 62q0 22 8 59l60 258l-154 4q-21 -103 -54.5 -209t-64.5 -151q-38 -23 -83 -23l-7 15q46 36 94 152.5t64 216.5q-81 0 -138 -54l-18 23q22 27 39.5 43
t61.5 33.5t100 17.5q43 0 131.5 -2.5t129.5 -2.5q23 0 33.5 5t24.5 25z" id="x1D70B"></path></g><g transform="matrix(.017,0,0,-.017,10.109,12.013)"><path d="M368 703l-264 -866h-60l265 866h59z" id="x2F"></path></g><g transform="matrix(.017,0,0,-.017,17.112,12.013)"><path d="M412 140l28 -9q0 -2 -35 -131h-373v23q112 112 161 170q59 70 92 127t33 115q0 63 -31 98t-86 35q-75 0 -137 -93l-22 20l57 81q55 59 135 59q69 0 118.5 -46.5t49.5 -122.5q0 -62 -29.5 -114t-102.5 -130l-141 -149h186q42 0 58.5 10.5t38.5 56.5z" id="x32"></path></g>
</svg>.</table>

International Journal of Antennas and Propagation

fig5

Figure 5

Figure 5: Can <svg style="vertical-align:-0.288pt;width:29.6875px;" id="M1" height="15.6375" version="1.1" viewBox="0 0 29.6875 15.6375" width="29.6875"  xmlns="http://www.w3.org/2000/svg">
	<g transform="matrix(1.25,0,0,-1.25,0,15.6375)">
		<g transform="translate(72,-59.49)">
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			</text>

		</g>
	</g>
</svg> Radiators Be Really Isotropic? 

International Journal of Antennas and Propagation

Can 𝜆 / 4 Radiators Be Really Isotropic?

Figure 5

Can Radiators Be Really Isotropic?