Abstract: A mobile communication device includes a case member, a circuit module and a radiating arm. The case member includes first and second case portions, each made of a metallic material. One of the first and second case portions has a feed-in portion configured to be fed with a radio frequency signal. One of the first and second case portions has a ground portion. The circuit module includes a radio frequency circuit and a ground conductor. The radio frequency circuit is coupled with the feed-in portion and is con figured to generate the radio frequency signal. The ground conductor is coupled to the ground portion and the first case portion. The radiating arm is coupled to the second case portion.

Abstract: A wideband antenna module includes a ground conductor, two radiating conductors and a decoupling inductor. Each of the radiating conductors includes a feed-in portion, a ground portion and three radiating portions. The feed-in portion is spaced apart from the ground conductor and has a feed-in end part. The ground portion is connected to the feed-in portion and the ground conductor. For each of the radiating conductors, the radiating portions are arranged in sequence from the feed-in portion to a free end part. The decoupling inductor is connected between the free end parts of the two radiating conductors.

Abstract: A mobile communication device includes a case member, a circuit module and a radiating arm. The case member includes first and second case portions, each made of a metallic material. One of the first and second case portions has a feed-in portion configured to be fed with a radio frequency signal. One of the first and second case portions has a ground portion. The circuit module includes a radio frequency circuit and a ground conductor. The radio frequency circuit is coupled with the feed-in portion and is con figured to generate the radio frequency signal. The ground conductor is coupled to the ground portion and the first case portion. The radiating arm is coupled to the second case portion.

Abstract: A wideband antenna module includes a ground conductor, two radiating conductors and a decoupling inductor. Each of the radiating conductors includes a feed-in portion, a ground portion and three radiating portions. The feed-in portion is spaced apart from the ground conductor and has a feed-in end part. The ground portion is connected to the feed-in portion and the ground conductor. For each of the radiating conductors, the radiating portions are arranged in sequence from the feed-in portion to a free end part. The decoupling inductor is connected between the free end parts of the two radiating conductors.

Abstract: A broadband antenna with adjustable resonant frequency band includes a grounding element, first and second radiating conductors, and a variable capacitor. The first radiating conductor includes a feed-in portion and a radiating portion. The feed-in portion includes a feed-in end spaced apart from and adjacent to the grounding element. The second radiating conductor includes a coupling portion, and a short-circuit portion connected electrically between the coupling portion and the grounding element. The coupling portion is parallel to and couples with the radiating portion. The variable capacitor is connected electrically between the radiating portion and the coupling portion.

Abstract: An antenna module includes a grounding element, first and second radiating conductors, and a decoupling unit. The grounding element has first and second grounding ends. The first radiating conductor includes a first feed-in end that is adjacent spacedly to the first grounding end and that is configured to be fed with a first RF signal. The second radiating conductor includes a second feed-in end that is adjacent spacedly to the second grounding end and that is configured to be fed with a second RF signal. The decoupling unit is connected electrically between a portion of the first radiating conductor and a portion of the second radiating conductor that are proximate to each other, and is one of a decoupling capacitor and a decoupling inductor.