IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0396983
(2009-03-03)
|
등록번호 |
US-8138986
(2012-03-20)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
17 |
초록
▼
A dipole antenna array comprising a ground plane, at least one dipole antenna including an active antenna element and a grounded antenna element, at least one reflector and integrated electronics, wherein the active antenna element is isolated from the ground plane and extends substantially perpendi
A dipole antenna array comprising a ground plane, at least one dipole antenna including an active antenna element and a grounded antenna element, at least one reflector and integrated electronics, wherein the active antenna element is isolated from the ground plane and extends substantially perpendicular to the ground plane and the grounded antenna element extends in a direction substantially opposite to the active antenna element, the ground plane is contained within the area bounded by the reflector; the integrated electronics include at least one of a signal down converter and a signal up-converter, and at least some of the integrated electronics are contained in a space defined by at least one of a portion of the ground plane and a portion of the reflector.
대표청구항
▼
1. A dipole antenna device, comprising: a ground plane;at least one dipole antenna comprising an active antenna element and a grounded antenna element, the active antenna element being isolated from the ground plane and extending in a direction substantially perpendicular to the ground plane, the gr
1. A dipole antenna device, comprising: a ground plane;at least one dipole antenna comprising an active antenna element and a grounded antenna element, the active antenna element being isolated from the ground plane and extending in a direction substantially perpendicular to the ground plane, the grounded antenna element extending in a direction substantially opposite to the active antenna element, wherein a frequency range of signals received by said at least one dipole antenna is a function of a physical dimension of said at least one dipole antenna;at least one reflector, wherein at least a portion of the ground plane is contained within an area substantially bounded by the reflector; andintegrated electronics comprising at least one of a signal down converter and a signal up-converter, wherein at least some of the integrated electronics are contained in a space defined by at least one of a portion of the ground plane and a portion of the reflector,wherein the integrated electronics and associated software determine the azimuth to the source of a transmitted signal from signal amplitude and signal phase of the transmitted signal measured at two adjacent dipole antenna elements. 2. The dipole antenna device of claim 1, wherein all of the integrated electronics are contained in said space. 3. The dipole antenna device of claim 1, wherein the dipole antenna comprises at least one material selected from metals, metallic coated plastic and printed circuit board material that includes at least one conductive layer. 4. The dipole antenna device of claim 1, wherein the integrated electronics are powered from an external source. 5. The dipole antenna device of claim 1, wherein the integrated electronics are powered by batteries contained within the dipole antenna device. 6. The dipole antenna device of claim 1, wherein the integrated electronics down-convert a received signal to an intermediate frequency. 7. The dipole antenna device of claim 1, the integrated electronics further comprising a digital compass. 8. The dipole antenna device of claim 1, further comprising an external interface and software to interface with a handheld device. 9. The dipole antenna device of claim 8, wherein the handheld device comprises at least one device selected from smart phones, PDAs and laptops. 10. The dipole antenna device of claim 1, wherein the integrated electronics scan through a plurality of user selectable frequency bands within a frequency range of signals received by said at least one dipole antenna. 11. The dipole antenna device of claim 1, wherein the user can select a particular frequency band within the frequency range of signals received by said at least one dipole antenna. 12. The dipole antenna device of claim 1, wherein the integrated electronics compares a signal amplitude and a signal phase of a transmitted signal received at a dipole antenna of the at least one dipole antenna that receives the highest signal amplitude and a signal amplitude and a signal phase of a transmitted signal received at a dipole antenna receiving the next highest signal amplitude that is adjacent to the dipole antenna receiving the highest signal amplitude to determine an azimuth of a source of the transmitted signal from the dipole antenna device. 13. The dipole antenna device of claim 12 further comprising another dipole antenna that is a known distance in terms of wavelength from the dipole antenna receiving the highest signal amplitude and provides multipath discrimination based on a signal amplitude and a signal phase of a transmitted signal received by the another dipole antenna. 14. The dipole antenna device of claim 12, wherein the integrated electronics compares the signal phase of the transmitted signal received at the dipole antenna receiving the highest signal amplitude, the signal phase of the transmitted signal received at a dipole antenna adjacent to the dipole antenna receiving the highest amplitude having the second highest signal amplitude and the signal phase of the transmitted signal received at a dipole antenna adjacent to the dipole antenna receiving the highest amplitude having the third highest signal amplitude to increase the accuracy of the azimuth estimate of the source of the transmitted signal. 15. The dipole antenna device of claim 14, wherein the dipole antenna device comprises a plurality of dipole antennas having known dimensions of separation and orientation with respect to the dipole antenna receiving the highest signal amplitude that provides multipath discrimination based on a signal amplitude and a signal phase of a signal received by one or more of the plurality of dipole antennas having known dimensions of separation and orientation with respect to the dipole antenna receiving the highest signal amplitude. 16. The dipole antenna device of claim 1, wherein an elevation angle is determined from the transmitted signal received at the dipole antenna device. 17. The dipole antenna device of claim 1, the integrated electronics further comprising a signal transmitter that is embedded within the space defined in part by at least one of a portion of the ground plane and a portion of the reflector. 18. The dipole antenna device of claim 17, the integrated electronics further comprising another wireless transmit and receive capability located on a peripheral boundary of the reflector such that it does not interfere with the antenna pattern of the dipole antenna device. 19. The dipole antenna device of claim 1, further comprising a radome covering the dipole antenna device, wherein the radome is made of a material having a low dielectric constant. 20. The dipole antenna device of claim 1, wherein an enclosure element which together with the portion of the ground plane and the portion of the reflector defines the space has a thickness sufficient to contain the integrated electronics at least in a direction parallel to the ground plane without adversely affecting the beam pattern of the dipole antenna device. 21. The dipole antenna device of claim 1, wherein an antenna-to-integrated electronics signal path has a loss of less than 0.5 dB. 22. The dipole antenna device of claim 1, wherein two or more dipole antenna devices are vertically stacked separated by a distance of about one half wavelength of the dipole antenna. 23. The dipole antenna device of claim 1, wherein two or more dipole antenna devices are stacked separated by a distance of greater than two wavelengths of the dipole antenna. 24. The dipole antenna device of claim 1, wherein two or more dipole antennas are formed in a diamond shape. 25. The dipole antenna device of claim 1, wherein two or more dipole antennas are formed in a linear manner with the reflector of each dipole antenna angled 45 degrees with respect to the angle of the dipole antenna device. 26. The dipole antenna array of claim 1, wherein adjacent dipole antennas are separated by a distance of greater than one quarter wavelength to less than one wavelength of the antenna to prevent ambiguity of phase. 27. A dipole antenna device, comprising: a ground plane;at least one dipole antenna comprising an active antenna element and a grounded antenna element, the active antenna element being isolated from the ground plane and extending in a direction substantially perpendicular to the ground plane, the grounded antenna element extending in a direction substantially opposite to the active antenna element, wherein a frequency range of signals received by said at least one dipole antenna is a function of a physical dimension of said at least one dipole antenna;at least one reflector, wherein at least a portion of the around plane is contained within an area substantially bounded by the reflector;integrated electronics comprising at least one of a signal down converter and a signal up-converter, wherein at least some of the integrated electronics are contained in a space defined by at least one of a portion of the ground plane and a portion of the reflector; andat least a first resonator located between an active antenna element and the reflector at an equal distance from the active antenna element and a rearmost portion of the reflector opposite the dipole antenna, wherein the physical dimensions of at least the first resonator enhances the frequency bandwidth and Voltage Standing Wave Ratio (VSWR) of the dipole antenna. 28. The dipole antenna device of claim 27, the first resonator comprising one of an active or passive resonator element that is isolated from the ground plane and extends in the same direction from the ground plane as the active antenna element and a grounded resonator element extending in an direction in the orthogonal ground plane directly opposite to the active or passive resonator element. 29. The dipole antenna device of claim 28, wherein the active element of the dipole is isolated from the ground plane using a material having a low dielectric constant. 30. The dipole antenna device of claim 28, wherein the first resonator is isolated from the ground plane with a material having a low dielectric constant. 31. The dipole antenna device of claim 28, wherein the thickness of the isolator above the ground plane for the active dipole element is less than ⅛ the wavelength of the highest frequency received by the dipole antenna element. 32. The dipole antenna device of claim 27, wherein the height of said at least one dipole antenna is equal to approximately ½ wavelength of the lowest frequency and the height of at least said first resonator is approximately ½ wavelength of the highest frequency, and wherein the bandwidth of the signals received is a function of the diameter of the dipole element and at least said first resonator. 33. A method of determining an azimuth to a source of a transmitted signal from a dipole antenna array, the method comprising: receiving a transmitted signal at more than one dipole antenna elements of the dipole antenna array;determining the dipole antenna element receiving the highest signal amplitude;determining the adjacent dipole antenna element receiving the next highest signal amplitude;determining an azimuth to the source of the transmitted signal from the dipole antenna array by comparing the signal amplitude and signal phase of the transmitted signal received at each of the two adjacent dipole antenna elements receiving the highest signal amplitude;interfacing with a handheld device, anddisplaying the azimuth to the source of the transmitted signal from the dipole antenna array on the handheld device display.
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