NOISE SAMPLING DETECTORS
A noise sampling detector suitable for portable electronic devices is disclosed. The detector may detect noise, transmitter signals, spurs, and/or interference. In one embodiment, a detector can include: a load portion; an antenna pattern shaping portion coupled to the load portion, where the antenna pattern shaping portion includes meandering segments of variable lengths and/or widths; and an impedance matching circuit coupled to the antenna pattern shaping portion.
1 . A noise sampling detector, comprising:
a load portion;
an antenna pattern shaping portion coupled to the load portion, wherein the antenna pattern shaping portion comprises a plurality of meandering segments; and
an impedance matching circuit coupled to the antenna pattern shaping portion.
2 . The noise sampling detector of claim 1 , wherein the plurality of meandering segments comprises segments of varying length.
3 . The noise sampling detector of claim 2 , wherein the varying length is configured to adjust a bandwidth of signal detection.
4 . The noise sampling detector of claim 1 , wherein the plurality of meandering segments comprises segments of varying width.
5 . The noise sampling detector of claim 4 , wherein the varying width is configured to change a shape of an antenna pattern.
6 . The noise sampling detector of claim 1 , wherein the impedance matching circuit comprises a transformer.
7 . The noise sampling detector of claim 1 , wherein the impedance matching circuit comprises a series or shunt inductor.
8 . The noise sampling detector of claim 1 , having dimensions of about 20 mm by about 20 mm.
9 . The noise sampling detector of claim 1 , having dimensions of about 4 mm by about 16 mm.
10 . The noise sampling detector of claim 1 , having a thickness of less than about 100 μm.
11 . The noise sampling detector of claim 1 , configured to detect noise, interference, and spurs in a received electromagnetic signal.
12 . A noise sampling detector, comprising:
a load portion;
an antenna pattern shaping portion coupled to the load portion, wherein the antenna pattern shaping portion comprises one or more notches on one or more sides in a square stub arrangement; and
an impedance matching circuit coupled to the antenna pattern shaping portion.
13 . The noise sampling detector of claim 12 , wherein each notch comprises a width and a depth.
14 . The noise sampling detector of claim 13 , wherein the width and the depth are equal.
15 . The noise sampling detector of claim 12 , wherein the width and the depth are varied to adjust a resonance frequency.
16 . The noise sampling detector of claim 12 , having dimensions of about 14 mm by about 14 mm.
17 . The noise sampling detector of claim 12 , having a thickness of less than about 100 μm.
18 . The noise sampling detector of claim 12 , wherein the impedance matching circuit comprises a transformer.
19 . The noise sampling detector of claim 12 , wherein the impedance matching circuit comprises a series or shunt inductor.
20 . The noise sampling detector of claim 12 , configured to detect noise, interference, and spurs in a received electromagnetic signal.
21 . The noise sampling detector of claim 12 , configured for a global positioning system (GPS) receiver.
22 . A system for detecting and canceling noise, the system comprising:
means for receiving an electromagnetic signal for a first signal path;
means for amplifying and filtering the received signal to provide an amplified signal;
means for detecting noise in a second signal path; and
means for canceling the detected noise from the first signal path.