Antenna Miniaturization with MEMS Tunable Capacitors: Techniques and Trade-Offs

<table>Low-band demonstrator, tuner placed in <svg height="14.5629pt" id="M50" style="vertical-align:-5.5398pt" version="1.1" viewbox="0 -9.0231 69.3184 14.5629" width="69.3184pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.0135,0,0,-0.0135,0,0)"><path d="M645 631C614 643 545 666 457 666C215 666 23 519 23 283C23 90 158 -16 337 -16C412 -16 489 2 522 10C543 39 590 127 606 167L580 181C519 89 459 18 348 18C201 18 122 136 122 287C122 464 244 632 435 632C544 632 602 595 608 472L639 475C643 526 645 581 645 631Z" id="g113-68"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="668" vert-adv-y="668"></glyph.data></g><g transform="matrix(.0095,0,0,-0.0095,8.982,3.264)"><path d="M169 380V459C122 440 66 423 24 416V392C86 384 90 382 90 317V-135C90 -201 81 -207 17 -213V-240H253V-213C176 -207 169 -201 169 -125V6C182 -1 208 -11 238 -12C368 12 487 109 487 260C487 358 421 449 310 449C298 449 279 444 261 433L169 380ZM169 346C196 367 237 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vert-adv-y="480"></glyph.data></g></svg> mm. The tuner has a minimum capacitance of 1 pF and a maximum capacitance of 4.875 pF.</table>

International Journal of Antennas and Propagation

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Figure 3

Figure 3: Antenna Miniaturization with MEMS Tunable Capacitors: Techniques and Trade-Offs 