Single-Arm Archimedean Spiral Antenna with Broadband Circular Polarization

<div>The simulated AR with different <span class="nowrap"><svg height="9.39034pt" id="M18" style="vertical-align:-3.42943pt" version="1.1" viewbox="-0.0498162 -5.96091 11.7205 9.39034" width="11.7205pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M559 271C559 395 493 448 433 448C370 448 304 394 275 297C259 245 235 121 219 37C157 54 113 110 113 201C113 310 180 386 276 429L265 457C131 410 23 326 23 186C23 83 86 5 211 -10C180 -159 167 -220 158 -252L165 -261C198 -255 236 -246 251 -218L287 -5C421 9 559 119 559 271ZM484 273C484 144 400 40 293 33L352 331C364 389 382 406 405 406C431 406 484 370 484 273Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,7.241,3.132)"><path d="M398 365C398 411 356 451 297 451C250 451 198 430 151 397C65 336 24 230 24 139C24 14 97 -12 148 -12C198 -12 284 7 373 104L355 130C306 84 246 53 198 53C132 53 111 109 111 163V189C209 211 398 261 398 365ZM317 351C317 308 273 262 117 225C134 338 189 383 221 399C230 404 249 407 263 407C295 407 317 389 317 351Z"></path></g></svg>.</span> (a) <i>xoz</i> plane at 1 GHz. (b) <i>yoz</i> plane at 1 GHz. (c) <i>xoz</i> plane at 6 GHz. (d) <i>yoz</i> plane at 6 GHz.</div>

International Journal of Antennas and Propagation

fig7

Figure 7

Figure 7: Single-Arm Archimedean Spiral Antenna with Broadband Circular Polarization 