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US 2006/0141943 A1Published application
Transmit and receive antenna switch
AssigneeNXP B.V.
InventorAntonius Johannes De Graauw
Life of this patent
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AssigneeNXP B.V.
InventorAntonius Johannes De Graauw
Estimating the term…
Antenna switches (1,10) in dual-band or multi-band mobile phones are according to a basic idea provided with a serial semiconductor switches (11,21,12,22) per transmitting branch (2,3) and with a further semiconductor switch (13,23) coupled in parallel to a receiving branch (4,5,6), to obtain isolation between branches (2-6) in a simple way. Said semiconductor switches are PIN diodes or MEMS switches or pHEMT switches. Another semiconductor switch (14) coupled in parallel to the receiving branches (4-6) allows together with said further semiconductor (13) the introduction of elements (15,16) without a transmission line. Alternatively, the antenna switch (1,10) may comprise a transmission line (24,25), in which case the receiving branches (4,5,6) can be switched via transistor switches (26,27,28). This all improves isolation, reduces costs, complexity, size and high Radio-Frequency (RF) losses.
Device comprising:
Module for a device, said module comprising:
Antenna switch (1,10) for switching transmitting branches (2,3) each for transmitting signals via an antenna (7) and at least one frequency band, with at least two receiving branches (4,5,6) each receiving signals via at least one frequency band and said antenna (7), wherein said antenna switch (1,10) comprises:
Method for switching transmitting branches (2,3) each for transmitting signals via an antenna (7) and at least one frequency band, with at least two receiving branches (4,5,6) each receiving signals via at least one frequency band and said antenna (7), which method comprises the steps of:
Dependencies are inferred from the claim text.