TY - RPRT TI - Characterization of tissue-equivalent materials for high-frequency applications (200 MHz to 20 GHz) AU - Givot, Brad AU - Johnson, Justin AU - Kim, Sung AU - Schallinger, Luke E AU - Baker-Jarvis, James PY - 2010 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 1554 DO - 10.6028/NIST.TN.1554 ER -