# US 2014/0198004 A1 · Filter antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0198004 A1 - Document ID: US20140198004A1 - Status: Published application - Kind: A1 - Application number: 14/156,378 - Filed: 2014-01-15 - Published: 2014-07-17 - Earliest claimed: 2013-01-15 - Assignees: Cubic Corporation - Applicants: Cubic Corporation - Inventors: Wayne Edward Richards; Nathan Labadie - Web page: https://patentgrep.com/patent/US20140198004A1 ## CPC - H01Q 15/24: Polarising devices; Polarisation filters (H01Q15/12, H01Q15/22 take precedence) - H01P 1/2088: {Integrated in a substrate} - H01P 11/00: Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type - H01Q 9/0407: {Substantially flat resonant element parallel to ground plane, e.g. patch antenna (dipole H01Q9/285; monopole H01Q9/40)} - H01Q 19/005: {Patch antenna using one or more coplanar parasitic elements} - H01P 1/201: Filters for transverse electromagnetic waves (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) - H01P 1/20381: {Special shape resonators} - H01Q 21/0056: {Conically or cylindrically arrayed} - Y10T 29/49018: with other electrical component - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A multi-pole filter antenna may include aperture-coupled non-dominant mode cavity resonators, and an aperture-coupled dominant mode patch antenna. The filter antenna may be implemented in a multilayer printed circuit board or similar structure. The filter antenna may for example operate in the Ku-Band, the Ka-Band, the C-Band, or another band. ## Claims ### Claim 1 A substrate integrated filter antenna, comprising: a cylindrical cavity resonator integrated with a substrate that supports two orthogonal modes; a thin film with an annular iris aperture integrated with the substrate and in series with the cylindrical cavity resonator; and a circular microstrip patch antenna integrated with the substrate and in series with the annular iris aperture. ### Claim 2 (depends on 1) The filter antenna of claim 1, further comprising a multi-port quadrature hybrid coupler in series with the cylindrical cavity resonator. ### Claim 3 (depends on 1) The filter antenna of claim 1, wherein the substrate comprises a printed circuit board. ### Claim 4 (depends on 1) The filter antenna of claim 1, wherein the cylindrical cavity resonator supports two orthogonal TM110 modes. ### Claim 5 (depends on 1) The filter antenna of claim 1, wherein the circular microstrip patch antenna supports a TM11 mode. ### Claim 6 A method for fabricating a substrate integrated filter antenna, comprising: forming a stack within a substrate that includes a cylindrical cavity resonator that supports at least two orthogonal modes, a thin film with an annular iris aperture in series with the cylindrical cavity resonator, and a circular microstrip patch antenna in series with the annular iris coupling aperture. ### Claim 7 (depends on 6) The method of claim 6, further comprising forming the cylindrical cavity resonator to exhibit a particular radius to control resonant frequency of the filter antenna. ### Claim 8 (depends on 6) The method of claim 6, further comprising forming the cylindrical cavity resonator from a particular dielectric material to control resonant frequency of the filter antenna. ### Claim 9 (depends on 6) The method of claim 6, further comprising forming the cylindrical cavity resonator to exhibit a particular height to control impedance of the cylindrical cavity resonator. ### Claim 10 (depends on 6) The method of claim 6, further comprising forming the annular iris aperture to exhibit a particular radius to control coupling of energy between the cylindrical cavity resonator and circular microstrip patch antenna. ### Claim 11 (depends on 6) The method of claim 6, further comprising forming the annular iris aperture to exhibit a particular width to control coupling of energy between the cylindrical cavity resonator and circular microstrip patch antenna. ### Claim 12 (depends on 6) The method of claim 6, further comprising forming the circular microstrip patch antenna to exhibit a particular radius to control at least one of resonant frequency and pattern gain of the filter antenna. ### Claim 13 (depends on 6) The method of claim 6, further comprising forming the circular microstrip patch antenna to exhibit a particular height to control at least one of directivity, efficiency, and bandwidth of the filter antenna. ### Claim 14 (depends on 6) The method of claim 6, further comprising forming the circular microstrip patch antenna from a particular dielectric material to control resonant frequency of the filter antenna. ### Claim 15 A digitally beam-formed antenna array, comprising: a plurality of filter antenna elements each including a cylindrical cavity resonator integrated with a particular substrate, a metallic thin film with an annular iris aperture integrated with the particular substrate and in series with the cylindrical cavity resonator, and a circular microstrip patch antenna integrated within the particular substrate and in series with the annular iris aperture. ### Claim 16 (depends on 15) The antenna array of claim 15, wherein at least one of the plurality of filter antenna elements further includes a plurality of annular iris coupled cylindrical cavity resonators so that the at least one filter antenna element is a multi-pole filter antenna. ### Claim 17 (depends on 15) The antenna array of claim 15, wherein the cylindrical cavity resonator supports a TM110 mode. ### Claim 18 (depends on 15) The antenna array of claim 15, wherein the circular microstrip patch antenna supports a TM11 mode. ### Claim 19 (depends on 15) The antenna array of claim 15, wherein at least one of the plurality of filter antenna elements is a transmitter antenna. ### Claim 20 (depends on 15) The antenna array of claim 15, wherein at least one of the plurality of filter antenna elements is a receiver antenna.