A self-contained 
radio frequency (RF) 
wireless communication device (100) comprising an explosion-proof housing (110), an internal electronic 
system for the conversion of 
radio wave and conducted electrical signals, and an internal antenna 
system located within a non-metallic portion (130) of the housing for collecting and emitting 
radio wave energy. The antenna 
system enables the 
wireless communication device (100) to safely collect and emit 
radio wave energy using one or more optimally configured antenna resonators (351), with each antenna 
resonator differing each other antenna 
resonator by at least one attribute in a group of attributes comprising: 
frequency response, field polarization, and 
wavelength spatial diversity.The present invention is a self-contained RF 
wireless communication device that provides data communications between two or more devices for the 
supervisory control and / or 
data acquisition of actuators, sensors, transducers, gas detectors, and other devices located in explosive hazardous locations without the need of installing one or more external antennas, one or more antenna connectors, excessive conduit connections and seals, and the like, whereby reducing system installation components count and eliminating conduit connections, furthermore reducing the probability of system-level failures caused by lower-level faults of components and conduit connections, resulting in a less expensive and 
safer electrical equipment installation.