What is spectrum retention department?

As an AI language model, I don't have access to any specific information on a "spectrum retention department" as this can be dependent on the organization or industry one is referring to. However, generally speaking, spectrum retention can refer to the process of keeping a company's allocated frequency spectrum (a range of electromagnetic waves) which is often essential in communication and broadcasting industries.

A spectrum retention department would typically be responsible for managing and monitoring the company's assigned frequency spectrum to ensure compliance with legal and regulatory requirements to avoid any license revocations. They would also be responsible for identifying new opportunities for acquiring additional spectrum and negotiating with regulatory bodies for renewals and assignment of new spectrum.

Overall, the goal of a spectrum retention department is to protect the company's investment in spectrum allocation, prevent interference with other users' frequency bands, and maintain the integrity of the company's communication infrastructure.