Final answer:
Low power radio transmitters are optimized to minimize power loss, achieved by controlling current and resistance. Lowering transmitted current reduces power loss, which is critical for system efficiency and range. Frequency also affects transmission efficiency, with lower frequencies associated with less energy loss.
Step-by-step explanation:
Each transmitter used in a low power radio (wireless) system should be designed to minimize power loss during transmission. Minimizing power loss is critical for maintaining the efficiency and range of the wireless system. This is often achieved through careful control of the current (Itransmitted) and resistance (Rwire) in the system.
According to the provided information, power loss (Plost) can be expressed in different ways such as Plost = Itransmitted Rwire and Plost = Itransmitted Vtransmitted. Reducing the current transmitted is an effective strategy to reduce power losses, as indicated by the formula Plost = Itransmitted² Rwire. In this context, 'I' refers to the current, 'V' to the voltage, and 'R' to the resistance of the wire. However, a balance is necessary, as too low a current might also result in inadequate transmission power.
The efficiency of power transmission also depends on the frequency of the transmitted waves. It is noted that lower frequency, lower-energy electromagnetic radiation is nonionizing and typically associated with less energy loss compared to higher frequencies that are ionizing. The lowest frequencies produced by high-voltage AC power lines are around 50 to 60 Hz.
In wireless communication devices like cell phones, the transmitter must maintain low power to ensure limited range for efficient handover between communication cells, as per the ground-based system that links phones to broadcast towers with a seamless transition.