A top-loaded whip antenna particularly suitable for use in a compact mobile communication device having dual band resonance and including an elongate conductive whip antenna portion and a choke defined over a portion of the elongate conductive whip antenna portion, thereby providing top loading. The average luminance of the first group in each field assumes a desired luminance for each pixel of the first group. The echo cancellation can be performed on an as needed basis without having to dedicate an echo canceller to each DS0 channel. The nature of the weave can control characteristics such as smoothness, absorption, and texture. Another aspect of the disclosure related to receiving by a communication device an impulse-mote-position-indication of at least one mote device; and deriving a geographic location of the at least one mote device at least partially in response to the receiving by the communication device the impulse-mote-position-indication of the at least one mote device. A circuit loop, including a reference oscillator, provides a fixed frequency reference for the phase locked loop to follow and a phase delay circuit connected between said phasefrequency comparator and said voltage controlled oscillator causes the voltage controlled oscillation to run ahead of the reference oscillator.