NOT APPLICABLE
NOT APPLICABLE
1. Technical Field of the Invention
This invention relates generally to radio wave communications and more particularly to routing radio waves within a device.
2. Description of Related Art
Many of today's portable electronic devices include a radio wave transceiver for connecting to a wireless local area network (WLAN), a cellular data network, a personal area network, and/or other wireless-type communication networks. For example, a laptop computer includes a WLAN transceiver, a Bluetooth transceiver, and may further include a cellular data network transceiver (or have one coupled to a port of the laptop). With today's wireless LAN, Bluetooth, and cellular data network frequencies (e.g., 900 MHz, 1800 MHz, 2.4 GHz, 5 GHz), the placement of one or more antennas within the laptop computer is primarily determined for convenience of manufacture, with moderate to little consideration for wireless communication performance.
As the frequency of RF communications increases (e.g., 60 GHz), the positioning of one or more antennas within a device becomes more critical. For instance, within a laptop computer, it is desirable to place one or more antennas within the display portion of the laptop computer to enhance wireless communication performance. The radio transceiver, however, is located proximal to the motherboard, which is typically in the keyboard section of the laptop. As such, coupling the one or more antennas to the radio transceiver is not a trivial task.
The present invention is directed to apparatus and methods of operation that are further described in the following Brief Description of the Drawings, the Detailed Description of the Invention, and the claims. Other features and advantages of the present invention will become apparent from the following detailed description of the invention made with reference to the accompanying drawings.
The wireless communication unit includes one or more antennas 30, a radio wave transceiver 38, a physical layer (PHY) module 40, and a media access control (MAC) layer module 42. The one or more antennas 30 are coupled to the radio wave transceiver 38 via a first rigid waveguide 32, a flexible micro strip and/or waveguide 34, a second rigid waveguide 36, and a plurality of transition couplers (shown in
The first rigid waveguide 32 may be a separate component that is mounted within the first section 12 of the device 10; it may be cast within the first section 12 of the device 10; or a combination thereof. The first rigid waveguide 32 may be composed of a conductive metal (e.g., copper, aluminum, gold, etc.) and have a geometric shape (e.g., circular tube, square tube, rectangular tube, oval tube, etc.). Alternatively, the first rigid waveguide 32 may be composed of a non-conductive material (e.g., plastic, etc.) having a metal coating. Note that the first rigid waveguide 32 is substantially linear, but may include a slight bend (e.g., up to 45°) to accommodate physical constraints of the first section of the device 10. Further note that the first rigid waveguide 32 may include multiple waveguide sections coupled together. Still further note that the antenna may be integrated into a housing of the wireless communication unit. For example, the antenna may be molded into the housing of the first section, may be fitted into a molded section of the housing, and/or may be fabricated in the housing as part of the manufacture of the first section.
Similarly, the second rigid waveguide 36 may be a separate component that is mounted within the second section 14 of the device 10; it may be cast within the second section 14 of the device 10; or a combination thereof. The second rigid waveguide 36 may be composed of a conductive metal (e.g., copper, aluminum, gold, etc.) and have a geometric shape (e.g., circular tube, square tube, rectangular tube, oval tube, etc.). Alternatively, the second rigid waveguide 36 may be composed of a non-conductive material (e.g., plastic, etc.) having a metal coating. Note that the second rigid waveguide 36 is substantially linear, but may include a slight bend (e.g., up to 45°) to accommodate physical constraints of the second section 14 of the device 10. Further note that the second rigid waveguide 36 may include multiple waveguide sections coupled together.
The flexible microstrip and/or waveguide 34 may be a separate component that is mounted within the hinge section 16 of the device 10; may be fabricated as part of the electrical connectivity of the hinge section 16; or a combination thereof. For example, the flexible microstrip and/or waveguide 34 includes a microstrip fabricated on a flexible substrate (e.g., Kapton substrate). Alternatively, or in addition to the previous example, the flexible microstrip and/or waveguide 34 includes a coplanar waveguide fabricated on a flexible substrate. Alternatively, or in addition to one or more of the previous examples, the flexible microstrip and/or waveguide 34 includes a flexible waveguide having a geometric shape.
In general, the radio wave transceiver 38 includes a receiver section and a transmitter section and operates in one or more of the following ISM bands and/or in the 60 GHz band (e.g., 56-64 GHz). The ISM bands of operation include one or more of the following:
The radio wave transceiver 38, the PHY module 40, and the MAC module 48 will be described in greater detail with references to one or more of
In an example of operation, the MAC module 42 converts outbound data (e.g., voice, text, audio, video, graphics, etc.) into PHY layer data and the PHY module 40 converts the PHY layer data into an outbound symbol stream in accordance with one or more wireless communication standards (e.g., GSM, CDMA, WCDMA, HSUPA, HSDPA, WiMAX, EDGE, GPRS, IEEE 802.11, Bluetooth, ZigBee, universal mobile telecommunications system (UMTS), long term evolution (LTE), IEEE 802.16, evolution data optimized (EV-DO), proprietary protocol, etc.). Such a PHY layer conversion includes one or more of: scrambling, puncturing, encoding, interleaving, constellation mapping, modulation, frequency spreading, frequency hopping, beamforming, space-time-block encoding, space-frequency-block encoding, frequency to time domain conversion, and/or digital baseband to intermediate frequency conversion.
The transmitter section 38 converts the outbound symbol stream into an outbound RF signal that has a carrier frequency within a given frequency band (e.g., ISM bands 36). In an embodiment, this may be done by mixing the outbound symbol stream with a local oscillation to produce an up-converted signal. One or more power amplifiers and/or power amplifier drivers amplifies the up-converted signal, which may be RF bandpass filtered, to produce the outbound RF signal. In another embodiment, the transmitter section 38 includes an oscillator that produces an oscillation. The outbound symbol stream provides phase information (e.g., +/−Δθ [phase shift] and/or θ(t) [phase modulation]) that adjusts the phase of the oscillation to produce a phase adjusted RF signal, which is transmitted as the outbound RF signal. In another embodiment, the outbound symbol stream includes amplitude information (e.g., A(t) [amplitude modulation]), which is used to adjust the amplitude of the phase adjusted RF signal to produce the outbound RF signal.
In yet another embodiment, the transmitter section 38 includes an oscillator that produces an oscillation. The outbound symbol provides frequency information (e.g., +/−Δf [frequency shift] and/or f(t) [frequency modulation]) that adjusts the frequency of the oscillation to produce a frequency adjusted RF signal, which is transmitted as the outbound RF signal. In another embodiment, the outbound symbol stream includes amplitude information, which is used to adjust the amplitude of the frequency adjusted RF signal to produce the outbound RF signal. In a further embodiment, the transmitter section 38 includes an oscillator that produces an oscillation. The outbound symbol provides amplitude information (e.g., +/−ΔA [amplitude shift] and/or A(t) [amplitude modulation) that adjusts the amplitude of the oscillation to produce the outbound RF signal.
The transmitter section 38 provides the outbound RF signal to the second rigid waveguide via a first transition coupler 50. The second rigid waveguide 36 conducts the outbound RF signal to the flexible microstrip and/or waveguide 34 via a second transition coupler 48. The flexible microstrip and/or waveguide 34 conducts the outbound RF signal to the first waveguide 32 via a third transition coupler 46. The first rigid waveguide 32 conducts the outbound RF signal to the antenna(s) 30 via a fourth transition coupler 44. The antenna(s) 30 transmit the outbound RF signal.
On the receive side, the antenna(s) 30 receive an inbound RF signal and provides to the first rigid waveguide 32 via the fourth transition coupler 44. The first rigid waveguide 32 conducts the inbound RF signal to the flexible microstrip and/or waveguide 34 via the third transition coupler 46. The flexible microstrip and/or waveguide 34 conducts the inbound RF signal to the second rigid waveguide 36 via the second transition coupler 48. The second rigid waveguide 36 conducts the inbound RF signal to the receiver section 38 via the first transition coupler 50.
The receiver section 38 amplifies the inbound RF signal to produce an amplified inbound RF signal. The receiver section 38 may then mix in-phase (I) and quadrature (Q) components of the amplified inbound RF signal with in-phase and quadrature components of a local oscillation to produce a mixed I signal and a mixed Q signal. The mixed I and Q signals are combined to produce an inbound symbol stream. In this embodiment, the inbound symbol may include phase information (e.g., +/−Δθ [phase shift] and/or θ(t) [phase modulation]) and/or frequency information (e.g., +/−Δf [frequency shift] and/or f(t) [frequency modulation]). In another embodiment and/or in furtherance of the preceding embodiment, the inbound RF signal includes amplitude information (e.g., +/−ΔA [amplitude shift] and/or A(t) [amplitude modulation]). To recover the amplitude information, the receiver section 38 includes an amplitude detector such as an envelope detector, a low pass filter, etc.
The PHY module 40 converts the inbound symbol stream into inbound PHY data in accordance with one or more wireless communication standards (e.g., GSM, CDMA, WCDMA, HSUPA, HSDPA, WiMAX, EDGE, GPRS, IEEE 802.11, Bluetooth, ZigBee, universal mobile telecommunications system (UMTS), long term evolution (LTE), IEEE 802.16, evolution data optimized (EV-DO), etc.). Such a conversion may include one or more of: digital intermediate frequency to baseband conversion, time to frequency domain conversion, space-time-block decoding, space-frequency-block decoding, demodulation, frequency spread decoding, frequency hopping decoding, beamforming decoding, constellation demapping, deinterleaving, decoding, depuncturing, and/or descrambling. The MAC module 42 converts the inbound PHY data into inbound data (e.g., voice, text, audio, video, graphics, etc.).
The transition coupler 54 includes an electrical receptacle 56 (and/or electrical connector 58) to provide an electrical connection between the rigid waveguide 52 and the flexible microstrip 34. The transition coupler 54 also includes a mechanism for physical coupling (e.g., flange, threaded coupler, etc.) to the rigid waveguide 52 and/or to the flexible microstrip 34. Note that the electrical coupling may also provide the mechanical physical coupling. The other transition couplers (e.g., between the antenna and the first rigid waveguide and between the second rigid waveguide and the radio wave transceiver) have similar electrical and mechanical properties as the present transition coupler 54.
The antenna structure includes an antenna 30, rigid waveguides 62, a flexible microstrip and/or waveguide 34, and transition couplers 64. The antenna structure may further include an impedance matching circuit if the impedance of the rigid waveguides 62, a flexible microstrip and/or waveguide 34, and transition coupler 64 does not substantially match the impedance of the antenna 30.
The T/R isolation & diversity selection module 82 functions to select one of the antenna assemblies. Such a select may be based on signal strength, signal to noise ratio, signal to interference ratio, etc. The T/R isolation & diversity selection module 82 may further include compensation circuitry to adjust for mismatches between antenna sections (e.g., different impedances, different quality factors, different frequency responses, etc.).
Each of the antenna structure includes an antenna 30, rigid waveguides 62, a flexible microstrip and/or waveguide 34, and transition couplers 64. The antenna structure may further include an impedance matching circuit if the impedance of the rigid waveguides 62, a flexible microstrip and/or waveguide 34, and transition coupler 64 does not substantially match the impedance of the antenna 30.
Each of the antenna structure includes an antenna 30, rigid waveguides 62, a flexible microstrip and/or waveguide 34, and transition couplers 64. The antenna structure may further include an impedance matching circuit if the impedance of the rigid waveguides 62, a flexible microstrip and/or waveguide 34, and transition coupler 64 does not substantially match the impedance of the antenna 30.
The MAC module 42 and PHY module 40 function to convert outbound data into a plurality of outbound symbol streams and to convert a plurality of inbound symbol streams into inbound data in accordance with one or more wireless communication standards. Each of the transmitter sections converts a corresponding one of the plurality of outbound symbol streams into an outbound RF signal. Each of the receiver sections converts a corresponding inbound RF signal into one of the plurality of inbound symbol streams.
The T/R isolation and MIMO module 84 provides the outbound RF signals to corresponding antenna structures when the transceiver is in a transmit mode. The T/R isolation and MIMO module 84 receives the inbound RF signals form the antenna structures and provides the inbound RF signals to corresponding ones of the receiver sections.
Each of the antenna structure includes an antenna 30, rigid waveguides 62, a flexible microstrip and/or waveguide 34, and transition couplers 64. The antenna structure may further include an impedance matching circuit if the impedance of the rigid waveguides 62, a flexible microstrip and/or waveguide 62, and transition coupler 64 does not substantially match the impedance of the antenna 30.
In an example, the coupling sections 92 provide connectivity for the dielectric core to the transition couplers. The shape of the coupling sections 92 may be conical for circular or elliptical cross-sections of the transition section 94, pyramid for square or rectangular cross-sections of the transition section 94, or other shape that mates with a receptacle shape of the transition couplers. Alternatively, one or both of the coupling sections 92 may include a female version of the mating receptacle of the transition coupler. For example, the transition coupler may include the male conical shaped coupler and the coupling section includes a female conical shaped coupler.
The coupler sections 92 provide an RF or MMW signal to the transition section 94 of the flexible waveguide 90. The length and angular shape of the transition sections 94 are selected to provide a desired impedance transformation. As such, the transition sections 94 provide impedance matching between the transition coupler and the transmission line. The transmission line section 96 propagates the RF or MMW signal from one transition section 94 to the other with minimal loss.
Each of the transition sections has a length of 0.500 inches and a partial conical shape. At the transmission line end of the transition sections, each transition section has an outer diameter of 0.112 inches and has a 0.165-inch outer diameter at the coupling section end. Each of the coupling sections has a length of 0.120 inches and a base outer diameter of 0.165 inches.
As may be used herein, the terms “substantially” and “approximately” provides an industry-accepted tolerance for its corresponding term and/or relativity between items. Such an industry-accepted tolerance ranges from less than one percent to fifty percent and corresponds to, but is not limited to, component values, integrated circuit process variations, temperature variations, rise and fall times, and/or thermal noise. Such relativity between items ranges from a difference of a few percent to magnitude differences. As may also be used herein, the term(s) “operably coupled to”, “coupled to”, and/or “coupling” includes direct coupling between items and/or indirect coupling between items via an intervening item (e.g., an item includes, but is not limited to, a component, an element, a circuit, and/or a module) where, for indirect coupling, the intervening item does not modify the information of a signal but may adjust its current level, voltage level, and/or power level. As may further be used herein, inferred coupling (i.e., where one element is coupled to another element by inference) includes direct and indirect coupling between two items in the same manner as “coupled to”. As may even further be used herein, the term “operable to” or “operably coupled to” indicates that an item includes one or more of power connections, input(s), output(s), etc., to perform, when activated, one or more its corresponding functions and may further include inferred coupling to one or more other items. As may still further be used herein, the term “associated with”, includes direct and/or indirect coupling of separate items and/or one item being embedded within another item. As may be used herein, the term “compares favorably”, indicates that a comparison between two or more items, signals, etc., provides a desired relationship. For example, when the desired relationship is that signal 1 has a greater magnitude than signal 2, a favorable comparison may be achieved when the magnitude of signal 1 is greater than that of signal 2 or when the magnitude of signal 2 is less than that of signal 1.
The present invention has also been described above with the aid of method steps illustrating the performance of specified functions and relationships thereof. The boundaries and sequence of these functional building blocks and method steps have been arbitrarily defined herein for convenience of description. Alternate boundaries and sequences can be defined so long as the specified functions and relationships are appropriately performed. Any such alternate boundaries or sequences are thus within the scope and spirit of the claimed invention.
The present invention has been described above with the aid of functional building blocks illustrating the performance of certain significant functions. The boundaries of these functional building blocks have been arbitrarily defined for convenience of description. Alternate boundaries could be defined as long as the certain significant functions are appropriately performed. Similarly, flow diagram blocks may also have been arbitrarily defined herein to illustrate certain significant functionality. To the extent used, the flow diagram block boundaries and sequence could have been defined otherwise and still perform the certain significant functionality. Such alternate definitions of both functional building blocks and flow diagram blocks and sequences are thus within the scope and spirit of the claimed invention. One of average skill in the art will also recognize that the functional building blocks, and other illustrative blocks, modules and components herein, can be implemented as illustrated or by discrete components, application specific integrated circuits, processors executing appropriate software and the like or any combination thereof.
This patent application is claiming priority under 35 USC §119(e) to: 1. a provisionally filed patent application entitled ANTENNA ROUTING SYSTEM FOR A HINGED DEVICE, having a provisional filing date of Feb. 5, 2010, and a provisional Ser. No. 61/301,966 (BP21690); and2. a provisionally filed patent application entitled 60 GHz FLEXIBLE WAVEGUIDE, having a provisional filing date of Apr. 5, 2010, and a provisional Ser. No. 61/321,007 (BP21805).
Number | Date | Country | |
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61321007 | Apr 2010 | US | |
61301966 | Feb 2010 | US |