With the continuous development of technology, robotic arms, as advanced automation equipment, have been widely used in the automotive industry. 

Low PIM passive devices are components that exhibit low passive intermodulation characteristics. Passive intermodulation occurs when two or more signals are present in a passive device with nonlinear characteristics, generating unwanted intermodulation products that can interfere with the normal operation of wireless communication systems.

Dielectric filters are electronic devices that utilize the properties of dielectric materials, such as low loss, high dielectric constant, small frequency - temperature coefficient, and small thermal expansion coefficient, to design and manufacture. They are composed of a ladder - type circuit in which several long - shaped resonators are longitudinally multi - stage connected in series or in parallel.

An antenna is a specialized transducer that converts electric current into electromagnetic (EM) waves or vice versa. It serves as the interface between radio waves propagating through space and electric currents moving in metal conductors, and is an essential component of all radio equipment. In transmission, the antenna radiates the energy from the current supplied by the radio transmitter as electromagnetic waves.