A compact, planar, dielectric-loaded, and multiple-band antenna for 2.45/5-GHzWLAN and 2.1-GHz wideband code-division multiple access (WCDMA) applications is presented in this letter. The antenna has a planar loop element with a shorting pin and a planar monopole element that are printed on the same substrate and driven by a microstrip line. The loop and monopole elements are covered by a thin FR4 layer on top to achieve good impedance matching at both bands. Analysis of the antenna has been realized using extensive 3-D full-wave electromagnetic simulations. Antenna measurements have also been presented, and it is shown that measurements and simulations are in good agreement.