Jesus I Castaneda

US Patent:

6753825, Jun 22, 2004

Filed:

Apr 23, 2002

Appl. No.:

10/128192

Inventors:

Hung Yu David Yang - Los Angeles CA
Jesus A Castaneda - Los Angeles CA

Assignee:

Broadcom - Irvine CA

International Classification:

H01Q 928

US Classification:

343795, 343700 MS

Abstract:

A printed antenna includes a 1 dipole section and a 2 dipole section. The 1 dipole section includes a 1 radiation section and a 1 frequency section. The 2 dipole antenna section includes a 2 radiation section and a 2 frequency section. The 1 and 2 dipole antenna sections are electrically coupled together such that the currents flowing through the 1 and 2 frequency sections substantially cancel and the current flowing through the 1 and 2 radiation sections are substantially cumulative for a  wavelength antenna. For a full wavelength antenna, 1 and 2 dipole antenna sections are electrically coupled together such that the currents flowing through the 1 and 2 frequency sections are substantially cumulative and the current flowing through the 1 and 2 radiation sections substantially cancel.

US Patent:

6809581, Oct 26, 2004

Filed:

Apr 23, 2002

Appl. No.:

10/128193

Inventors:

Rozieh Rofougaran - Marina Del Rey CA
Jesus A. Castaneda - Los Angeles CA
Hung Yu David Yang - Los Angeles CA
Lijun Zhang - Los Angeles CA

Assignee:

Broadcom Corp. - Irvine CA

International Classification:

G06G 712

US Classification:

327563, 330301, 333 25

Abstract:

An integrated low noise amplifier includes an on-chip balun, a line impedance matching circuit and an on-chip differential amplifier. The on-chip balun is operably coupled to convert a single ended signal into a differential signal. The line impedance matching circuit is operably coupled to the primary of the on-chip balun to provide impedance matching for a line carrying the single ended signal. The on-chip differential amplifier is operably coupled to amplify the differential signal and is impedance matched to the secondary of the on-chip balun.

US Patent:

6862004, Mar 1, 2005

Filed:

Feb 6, 2003

Appl. No.:

10/359140

Inventors:

Nicolaos G. Alexopoulos - Irvine CA, US
Franco De Flaviis - Irvine CA, US
Jesus Alfonso Castaneda - Los Angeles CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H01Q001/36

US Classification:

343895, 343876

Abstract:

A system includes a support device and an elongated spiral antenna coupled to the support device. The elongated spiral antenna has a contracted portion and an expanded portion. The expanded portion provides beam steering and directivity. The system also includes a feed line coupled to the elongated spiral antenna. A method for forming the elongated spiral antenna uses a predetermined formula to form arms of the elongated spiral antenna. The arms can be formed by printing the arms on a printed circuit board.

US Patent:

6947010, Sep 20, 2005

Filed:

Dec 3, 2004

Appl. No.:

11/002643

Inventors:

Nicolaos G. Alexopoulos - Irvine CA, US
Franco De Flaviis - Irvine CA, US
Jesus Alfonso Castaneda - Los Angeles CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H01Q001/36

US Classification:

343895, 343876

Abstract:

A system includes a support device and an elongated spiral antenna coupled to the support device. The elongated spiral antenna has a contracted portion and an expanded portion. The expanded portion provides beam steering and directivity. The system also includes a feed line coupled to the elongated spiral antenna. A method for forming the elongated spiral antenna uses a predetermined formula to form arms of the elongated spiral antenna. The arms can be formed by printing the arms on a printed circuit board.

US Patent:

7034770, Apr 25, 2006

Filed:

May 10, 2004

Appl. No.:

10/842604

Inventors:

Hung Yu David Yang - Los Angeles CA, US
Jesus A Castaneda - Los Angeles CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H01Q 9/16
H01Q 1/38

US Classification:

343793, 343700 MS

Abstract:

A printed dipole antenna includes a metal trace having first type sections and second type sections, wherein currents within the first type sections substantially cancel and currents the second type sections are substantially cumulative.

US Patent:

7119631, Oct 10, 2006

Filed:

May 12, 2004

Appl. No.:

10/844237

Inventors:

Jesus Alfonso Castaneda - Los Angeles CA, US
Qiang (Tom) Li - Irvine CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03H 7/38

US Classification:

333 32, 330302, 330305

Abstract:

Off-chip LC circuit for lowest ground and VDD impedance for power amplifier. A novel approach is made by which a chip to PCB (Printer Circuit Board) interface may be made such that the ground and VDD potential levels are effectively brought onto the die of the chip such that a true ground potential is maintained within the chip. This off-chip LC circuit operates cooperatively with an on-chip decoupling capacitor to reduce the overall effective inductance of the bond wires employed to bring signal and voltage levels from the die to the chip exterior. This circuit ensures a relatively low impedance for a PA (Power Amplifier) that is implemented within chip thereby providing for improved performance.

US Patent:

7129784, Oct 31, 2006

Filed:

Oct 28, 2004

Appl. No.:

10/975240

Inventors:

Iqbal Bhatti - Los Angeles CA, US
Jesus Castaneda - Los Angeles CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03F 3/68

US Classification:

330295, 330195

Abstract:

A multi-level power amplifier architecture using a multi-tap transformer implemented on a single CMOS integrated circuit wireless communications device is described. By providing a multi-tap transformer for coupling a plurality of power amplifiers to a shared output impedance, such as an antenna, power transmission may be made at different levels while maintaining efficiency. With a multi-tap transformer having “N” taps featuring “N” different impedance levels, each tap may be connected to an amplifier cell which delivers power into the transformer at the tap for coupling to the output load. Any one of the “N” amplifier cells can be turned on at once along with any combination of the “N” amplifier cells.

US Patent:

7129803, Oct 31, 2006

Filed:

Mar 16, 2004

Appl. No.:

10/802015

Inventors:

Shahla Khorram - Irvine CA, US
Qiang Li - Irvine CA, US
Jesus Alfonso Castaneda - Los Angeles CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H03H 7/42
H03H 11/28

US Classification:

333 25, 333177

Abstract:

A tuned transformer balun circuit includes a transformer balun, a first tuning capacitor, a second tuning capacitor, and a third tuning capacitor. A first plate of the first tuning capacitor is operably coupled to a first node of the differential winding and a second plate of the first tuning capacitor is operably coupled to a circuit ground. A first plate of the tuning capacitor is operably coupled to a second node of the differential winding and a second plate of the second tuning capacitor is operably coupled to the circuit ground. A first plate of the third tuning capacitor is operably coupled to a first node of the single-end winding and the second plate of the third tuning capacitor is operably coupled to transceiver radio frequency signals, wherein, based on loading of the single-ended winding and the differential winding, the first, second, and third tuning capacitors resonate with the transformer balun to provide efficient energy transfer from the transmitter section to the antenna.