Loop antenna and electronic equipment including loop antenna

Abstract

The present invention is intended to improve the receiving performance of a loop antenna to be connected to an IC chip that is incorporated in an IC card or a portable cellular phone. A loop antenna that is connected to an IC chip which has a CPU and a memory mounted thereon and which is incorporated in a casing, and that transmits or receives predetermined electromagnetic waves to or from a reader writer includes a main loop antenna and at least one sub-loop antenna disposed away from the main loop antenna. The sub-loop antenna is connected to the IC chip in parallel with or in series with the main loop antenna. A transmission/reception frequency at which the sub-loop antenna transmits or receives electromagnetic waves may be different from the one at which the main loop antenna transmits or receives electromagnetic waves.

Dependencies are inferred from the claim text.