Front end module for wireless network system
First Claim
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1. A front end module for wireless network system comprising:
- a transmitting/receiving switch;
a band-pass filter connected to the transmitting/receiving switch for receiving wanted signals and rejecting undesired signals;
a balun connected to the band-pass filter for transferring the wanted signals from unbalance to balance;
a power amplifier for raising the power of signals to be transmitted; and
a low-pass filter connected to the power amplifier for rejecting the spurious signals of the signals to be transmitted;
wherein the band-pass filter, the balun, and the low-pass filter lie inside a plurality of low temperature co-fired ceramic substrates while the transmitting/receiving switch and the power amplifier lie on a surface layer of the plurality of low temperature co-fired ceramic substrates.
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Abstract
A front end module for wireless network system is disclosed. The front end module includes a transmitting/receiving switch, a bandpass filter, a balun, a lowpass filter, and a power amplifier. The front end module is characterized in that the bandpass filter, the balun and the lowpass filter are formed inside a plurality of low-temperature-cofired-ceramic (LTCC) substrates by a patterning process while the transmitting/receiving switch, and the power amplifier are formed on a surface layer of the LTCC substrates by the surface mounting technology (SMT).
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Citations
15 Claims
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1. A front end module for wireless network system comprising:
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a transmitting/receiving switch; a band-pass filter connected to the transmitting/receiving switch for receiving wanted signals and rejecting undesired signals; a balun connected to the band-pass filter for transferring the wanted signals from unbalance to balance; a power amplifier for raising the power of signals to be transmitted; and a low-pass filter connected to the power amplifier for rejecting the spurious signals of the signals to be transmitted; wherein the band-pass filter, the balun, and the low-pass filter lie inside a plurality of low temperature co-fired ceramic substrates while the transmitting/receiving switch and the power amplifier lie on a surface layer of the plurality of low temperature co-fired ceramic substrates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification