Abstract: An adapter assembly is provided for adapting a portable cellular telephone to receive an external replacement antenna or an external direct feed connection by replacing the internal antenna connection of the cellular telephone. The adapter assembly includes a body portion with an antenna-receiving bore, a telephone chassis contact portion at the other end a circuit board interposed between the body and contact portion which spaces them apart and interconnects them together. The circuit board has circuitry thereon which transposes the connections effected thereby between coaxial conductors of the assembly body and contact portions.

Abstract: A self-adjusting antenna mounting assembly includes a protective base cap member which engages a vehicle antenna base and a contact extension cartridge. The contact cartridge includes a spring-biased hollow contact sleeve which biases the contact sleeve within a cavity so that it adjusts for varying lengths of contact pins which it engages. The contact sleeve has multiple arc-like segments which permit it to engage a contact pin of the antenna base, while not transferring any forces to it during installation.