The variety of single-wire, complex beam arrays, multiband, yagis to parabolic dishes are all used to work different frequencies and different propagation conditions.
From major contracts to company mergers to industry forecasts and new distributors, business activity plays a major role in the world of two-way radio.
Although many components are now incorporated into ICs, crystals, diodes, capacitors, resistors, LEDs and filters are all widely added as discrete components to complete equipment.
From the simple mains plug to specialised transmission line connectors, plugs are an integral part of any radio system. Balanced cables and coax with their own plugs are also widely used.
Parabolic dishes of various sizes as well as more simple antennas require low noise amplifiers that are incorporated into communications and global positioning/navigation. Increasing attention is being paid to vehicle and asset tracking with mobile equipment.
Enclosures make equipment safe to operate and visually attractive and workable. Soldering technology from irons to stations has undergone change since lead was banned as a constituent of solder.
Batteries of lithium-ion, cadmium, metal hydride or lead acid can be used in place of mains power that is often switchmode or super-regulated or can be a dual AC/DC system.
A growing area of radio involves goods to which radio tags have been attached on which information is coded that can be read and interpreted by special reading devices. The operating range and complexity of information is increasing.
Used increasingly as equipment moves from analog to digital. Programmable devices are significant in some radio operations particularly in test equipment and the latest handhelds.
Test equipment from digital multimeters, oscilloscopes and analysers to signal generators, VSWR meters and signal strength meters - all are essential tools for maintaining clear and interference-free signals and fault tracing.