Title:
Wireless device with filters to support coexistence in adjacent frequency bands
Document Type and Number:
Japanese Patent JP6290105
Kind Code:
B2
Abstract:
Techniques for using a narrow filter located before a power amplifier to reduce interference in an adjacent frequency band are disclosed. In an exemplary design, an apparatus (e.g., a wireless device) includes the narrow filter and the power amplifier. The narrow filter is for a first frequency band (e.g., Band 40) and has a first bandwidth that is more narrow than the first frequency band. The narrow filter receives and filters an input radio frequency (RF) signal and provides a filtered RF signal. The power amplifier receives and amplifies the filtered RF signal and provides an amplified RF signal. The apparatus may further include a full filter for the first frequency band and located after the power amplifier. The full filter receives and filters the amplified RF signal and provides an output RF signal when it is selected for use.
Inventors:
Lane, Mark Vernon
Lee, Chang-ho
Hollenstein, Christian
Ranjan, Mahim
Sampas, Prabean-Kuma
Boss, frederick
Belma, Summit
Sampson, Wesley Alan
Lee, Chang-ho
Hollenstein, Christian
Ranjan, Mahim
Sampas, Prabean-Kuma
Boss, frederick
Belma, Summit
Sampson, Wesley Alan
Application Number:
JP2014558899A
Publication Date:
March 07, 2018
Filing Date:
February 22, 2013
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04B1/04; H03F3/24; H04B1/40
Domestic Patent References:
| JP2004222171A | ||||
| JP2010136298A | ||||
| JP2000324184A |
Attorney, Agent or Firm:
Kurata Masatoshi
Yoshihiro Fukuhara
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Tadashi Inoue
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Yoshihiro Fukuhara
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Tadashi Inoue
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi