What type of antennas does the interrogator use to transmit challenges?

The interrogator in a communication system utilizes both omnidirectional and unidirectional antennas to transmit challenges effectively.

Omnidirectional antennas are especially useful in situations where the signal needs to be transmitted in all directions, allowing for a wider coverage area. This characteristic is particularly important in environments where the exact location of the target device is unknown. Being able to broadcast challenges in all directions increases the likelihood that the device will receive the signal and respond.

Unidirectional antennas, on the other hand, are designed to focus the signal in a specific direction. This capability is valuable for point-to-point communication, where the interrogator targets a particular device or location. The focused energy helps in reducing interference and increasing the range and strength of the transmitted signal in the intended direction.

Utilizing both types of antennas allows the interrogator to maintain flexibility and efficiency in communication, catering to diverse operational scenarios. This dual approach enhances the overall performance and reliability of the system in transmitting challenges.