Method and system for configuring a leaky wave antenna utilizing micro-electro mechanical systems
View Patent ↗Methods and systems for configuring a leaky wave antenna (LWA) utilizing micro-electromechanical systems (MEMS) are disclosed and may include configuring a resonant frequency of one or more LWAs in a wireless device utilizing MEMS actuation. RF signals may be communicated using the LWAs. The LWAs may be integrated in metal layers in a chip, an integrated circuit package, and/or a printed circuit board in the wireless device. The LWAs may include microstrip waveguides where a cavity height of the LWAs may be dependent on a spacing between conductive lines in the microstrip waveguides. The LWAs may be configured to transmit the wireless signals at a desired angle. The integrated circuit package may be affixed to a printed circuit board and an integrated circuit may be flip-chip-bonded to the integrated circuit package. An air gap may be integrated adjacent to one or more of the metal layers for the MEMS actuation.
1. A leaky wave antenna, comprising:
a reflective surface configured to reflect electromagnetic energy;
a partially reflective surface spaced apart from the reflective surface by a given distance to form a cavity, the partially reflective surface being configured to reflect a first portion of the electromagnetic energy into the cavity, a second portion of the electromagnetic energy radiating from a side of the partially reflective surface that is opposite the cavity; and
a plurality of feed points, each located at a different distance with respect to the reflective surface, each of the plurality of feed points presenting a different input impedance for the leaky wave antenna, the plurality of feed points being configured to provide the electromagnetic energy into the cavity,
wherein the partially reflective surface includes a plurality of slots configured to allow the second portion of the electromagnetic energy to radiate from the side of the partially reflective surface that is opposite the cavity,
a spacing between the plurality of slots is configured to set a bandwidth of the leaky wave antenna, and
the spacing of the plurality of slots is adjustable via micro-electromechanical systems (MEMS) to set the bandwidth of the leaky wave antenna.
2. The leaky wave antenna according to claim 1 , wherein the reflective surface and the partially reflective surface are planar.
3. The leaky wave antenna according to claim 2 , wherein the cavity is a uniform height throughout defined by the given distance.
4. The leaky wave antenna according to claim 3 , wherein the given distance is adjustable via micro-electromechanical systems (MEMS).
5. A communication device, comprising:
a power amplifier configured to generate electromagnetic energy that includes communication information; and
a leaky wave antenna, including:
a reflective surface configured to reflect electromagnetic energy,
a partially reflective surface spaced apart from the reflective surface by a given distance to form a cavity, the partially reflective surface being configured to reflect a first portion of the electromagnetic energy into the cavity, a second portion of the electromagnetic energy radiating from a side of the partially reflective surface that is opposite the cavity, and
a plurality of feed points, each located at a different distance with respect to the reflective surface, each of the plurality of feed points presenting a different input impedance for the leaky wave antenna, the plurality of feed points being configured to provide the electromagnetic energy into the cavity
wherein the partially reflective surface includes a plurality of slots configured to allow the second portion of the electromagnetic energy to radiate from the side of the partially reflective surface that is opposite the cavity,
a spacing between the plurality of slots is configured to set a bandwidth of the leaky wave antenna, and
the spacing of the plurality of slots is adjustable via micro-electromechanical systems (MEMS) to set the bandwidth of the leaky wave antenna.
6. The communication device according to claim 5 , wherein the reflective surface and the partially reflective surface are planar.
7. The communication device according to claim 6 , wherein the cavity is a uniform height throughout defined by the given distance.
8. The communication device according to claim 7 , wherein the given distance is adjustable via micro-electromechanical systems (MEMS).
9. A communication device, comprising:
a power amplifier configured to generate electromagnetic energy that includes communication information; and
a leaky wave antenna, including:
a reflective surface configured to reflect electromagnetic energy,
a partially reflective surface spaced apart from the reflective surface by a given distance to form a cavity, the partially reflective surface being configured to reflect a first portion of the electromagnetic energy into the cavity, a second portion of the electromagnetic energy radiating from a side of the partially reflective surface that is opposite the cavity, and
a plurality of feed points, each located at a different distance with respect to the reflective surface, each of the plurality of feed points presenting a different input impedance for the leaky wave antenna, the plurality of feed points being configured to provide the electromagnetic energy into the cavity,
wherein the partially reflective surface includes a plurality of patches to reflect the first portion of the electromagnetic energy into the cavity,
a spacing between the plurality of patches is configured to set a bandwidth for the leaky wave antenna, and
the spacing of the plurality of patches is adjustable via micro-electromechanical systems (MEMS) to set the bandwidth of the leaky wave antenna.