Patent ID: 8531252
Filing Date: 2013-09-10
Classification: H04B

Abstract:
1. An antenna duplexer comprising: an antenna terminal; a first filter electrically connected to the antenna terminal, the first filter passing a first frequency band; a second filter electrically connected to the antenna terminal, the second filter passing a second frequency band; and a third filter electrically connected to the antenna terminal, the third filter passing a third frequency band, wherein the first filter and the third filter are used for a first band, and the second filter and the third filter are used for a second band, wherein the first filter and the third filter are formed on a first piezoelectric substrate, wherein the second filter is formed on a second piezoelectric substrate separated from the first piezoelectric substrate, wherein one end of the first filter and one end of the second filter are connected to a common transmit terminal, and wherein the third filter is connected to a receive terminal.