On Calibration and Direction Finding with Uniform Circular Arrays

<p>Normalised sensor positions in the x-y-plane (array top view) as assumed by the model, and before and after global calibration. The sensor positions are normalised to the centre wavelength <span class="nowrap"><svg height="12.5794pt" id="M91" style="vertical-align:-3.29107pt" version="1.1" viewbox="-0.0498162 -9.28833 12.142 12.5794" width="12.142pt" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M529 97L508 118C475 75 449 58 438 58C428 58 421 66 415 104C393 234 374 403 364 496C345 670 307 712 254 712C220 712 174 691 153 669L161 645C176 653 194 658 206 658C237 658 261 640 278 562C287 522 290 483 293 434C223 269 110 105 23 9L32 -12C59 -6 85 0 108 7C152 64 251 252 300 366C307 297 315 221 337 82C346 24 363 -12 393 -12C425 -12 475 13 529 97Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,7.761,3.132)"><path d="M387 400C387 425 348 451 303 451C247 451 176 414 132 376C69 322 24 228 24 148C24 43 74 -12 147 -12C211 -12 301 33 363 103L346 128C319 99 249 51 193 51C148 51 112 84 112 165C112 230 130 287 154 330C170 359 199 400 243 400C277 400 304 383 326 354C333 345 343 343 354 348C378 360 387 382 387 400Z"></path></g></svg>.</span></p>

International Journal of Antennas and Propagation

On Calibration and Direction Finding with Uniform Circular Arrays

Figure 3