The demand for wireless high-speed data services makes the development of broadband wireless mobile communications systems important. This includes the development of accurate channel models to characterize the fading for a variety of propagation environments from microwave to millimeter wave frequencies. In this work, narrowband statistical propagation models for small-scale fading are obtained from experimental data using a low profile directional antenna called the dual exponentially tapered slot antenna (DETSA) on both transmit and receive . This work compares how the parameters used in Rician and Nakagami distributions are impacted by the antenna separation and the frequency of operation. Measurements were performed in a variety of rooms at SGHz and at 30GHz. The SGHz DETSA antenna is six times larger than the 30GHz DETSA. The results can be used to develop channel models to compare performance improvements used with smart antenna systems. The DETSA has a directional pattem, has an excellent impedance match over a very broad frequency range, and does not require tuning elements (and thus bias power) to achieve wide bandwidth. Three different types of measurements were considered: one is a near line-of-sight (LOS) setting, one is a far LOS setting, and the third is a non-line-of-sight (NLOS) setting.