Patent Application
20150263419
Radios have historically included a side accessory connector for attaching an accessory to the radio. The inclusion of a side accessory connector in the frame/housing of a radio influences the cost, size, and form of the radio. For example, when a radio designed with relatively thin sides is to incorporate a side accessory connector, the sides of the radio must be designed to be sufficiently wide to accommodate the side accessory connector. Therefore, removal of the accessory connector from the side of the radio allows for the radio cost and size to be further reduced.
The side accessory connector may connect accessories that provide a radio frequency (RF) interface (transmitting, receiving, or transceiving RF signals). Therefore, an internal switch is required within the radio to switch from a main antenna (for example, a coaxially-fed antenna attached to the top of the radio) to the side-connected accessory, and vice versa. This internal switch also requires space within the radio unit that can further affect the cost and size of the radio.
When an antenna is affixed to the top of a radio, as previously described, the length of the antenna is typically relatively long. For example, the length of a VHF antenna, operating in the 136-174 MHz range, affixed to the top of a radio may reach 24 cm. The relatively long length of the antenna may hinder movements of a user wearing the radio on, for example, a belt-supported carry accessory. Consider an example where a user is equipped with a belt-worn radio. As the user moves into and out of a vehicle, the antenna may get caught in, for example, the seat belt. This relatively long length of the antenna may also result in the antenna hitting the user's body frequently during normal use. For instance, depending on the body size of the user, the tip of the antenna may stop right under the user's arm pit, causing discomfort. Accordingly, there is a need for a method and apparatus for reducing the size of an antenna and integrating an antenna with an accessory connector connected with an accessory via a cable.
The accompanying figures, where like reference numerals refer to identical or functionally similar elements throughout the separate views, together with the detailed description below, are incorporated in and form part of the specification, and serve to further illustrate embodiments of concepts that include the claimed invention, and explain various principles and advantages of those embodiments.
Skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of embodiments of the present invention.
The apparatus and method components have been represented where appropriate by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.
Some embodiments are directed to methods and apparatuses for forming an antenna connection system. The antenna connection system includes a base affixed to a radio. The base includes a first base connector and a second base connector with a plurality of radial interconnectors positioned around the perimeter of the first base connector. The antenna connection system also includes an antenna connector including a first antenna connector and a second antenna connector with a plurality of radial interconnectors positioned around the perimeter of the first antenna connector. The first base connector is connected to the first antenna connector to form a central radio frequency (RF) coaxial connection and a first transmission line for a first antenna in the radio. The second antenna connector is connected to the second base connector to form a second transmission line and a plurality of radial connections around the perimeter of the central RF coaxial connection, wherein the plurality of radial connections is configured to function as at least one of a signal carrier and an additional RF element.
A radial connector 106 (also referred to as a second base connector 106) with individual radial interconnectors may be “wrapped”/positioned around the insulating material 110. In
The additional RF transmission line(s) may be used to feed one or more additional antennas associated with one or more accessories within a collection of accessories that are compatible with the disclosed connector. The additional antennas may operate on different frequency bands (for example, GPS, WLAN, Bluetooth, and/or LTE) than the frequency bands on which the main antenna operates. Having a separate feed for the additional antenna(s) eliminates the need for diplexer circuits, may improve overall system efficiency, and provides more flexibility in designing the antenna radiating elements. System 100 therefore provides the ability to launch RF signals and make additional connections from one or more additional antennas integrated in the same antenna structure.
The additional lines provided by radial connector 106 also allows for operating at least one tunable antenna among those that can be hosted in the accessory, where the tunable antenna may be controlled by applying control voltages to tuning elements (not shown), for instance tunable capacitors, which are embedded in RF antenna connection system 100 or in the connected accessory. Other interconnector elements in RF connector 106 may supply the biasing voltages that may be required to turn on the tuning elements. Alternatively, when a main LMR antenna is affixed to the radio, rather than the accessory, the available tuning signal lines can be used to operate tuning elements embedded in the antenna.
The geometrical form of the main LMR antenna may be, for example, a relatively short extension from the housing of the radio when compared with the geometrical form of a main LMR antenna in a radio with a side accessory connector. Considering that for the same antenna efficiency/gain, a smaller antenna length reduces the antenna bandwidth, in some embodiments, the main LMR antenna may seem like an “internal antenna” with relatively narrow bandwidth. The main LMR antenna can also feature a tunable main LMR antenna that may be controlled by supplying control voltages to tuning elements using, for example, radio software. Therefore, a main LMR antenna with relatively narrow instantaneous bandwidth (bandwidth provided in each tuning state) that can be tunable may be configured to cover a full operating bandwidth. Accordingly, while an overall antenna structure formed in accordance with some embodiments may have a relatively smaller length than that of past coaxially-fed antenna structures, the overall antenna structure can be configured to cover a full operating bandwidth. Because the overall antenna structure may include the main tunable LMR antenna and at least one other tunable antenna, the main LMR antenna and the tunable antenna(s) may be configured to cover a full LMR operating bandwidth as well as other frequency bands (for example, GPS, WLAN, Bluetooth, and/or LTE).
In some embodiments, RF antenna connection system 100 may incorporate twenty four interconnectors or twelve interconnectors with redundancy. A notch 108 may be provided for aligning radial connector 106 with a corresponding radial connector on an antenna connector (as shown, for example, in
The overall antenna 300 formed by connecting connector 200 to the RF antenna connection system 100, as shown in
The main LMR antenna may include passive or active components. The active components may be controlled by the tuning elements described above to effectively form a tunable LMR antenna. The additional antenna(s) may also include active components and passive components. For example, an active component associated with an additional antenna may be powered on and have a bias in voltage and may perform certain functions, wherein the active component may, for example, change a certain impedance state that in turn modifies the frequency response of the associated antenna and adapts to the need of the user. The active component in this example may use three radial interconnectors, for example three connections like connection 306, a voltage bias/ground pin, a pin for powering up the antenna, and a pin for changing its impedance state. A passive component may not be bias by voltage and may just have voltage applied to it. An example of a passive component is a capacitor that may change its capacitance to modify the frequency response of an associated antenna and adapt to the need of the user. The passive component in this example may use two radial interconnectors, such as two connections like connection 306, a voltage bias terminal and a ground terminal.
By adding additional transmission lines using radial connection 306, antenna 300 provides the benefit of enabling a tunable antenna control by supplying the control voltages to elements of radial connection 306. Some embodiments therefore provide additional electrical connections into the main antenna connector that is typically located on the top of the radio, while reducing the size of the overall antenna structure. Incorporating additional transmission lines into the overall antenna structure also provides additional flexibility in designing the form of the radio (for example, by eliminating the need for side accessory connectors), as will be shown and described in conjunction with
Some embodiments therefore provide the benefit of enabling a tunable antenna control by supplying the control voltages to elements of a radial connection in the antenna structure. In some embodiments, enabling tuning of the main LMR antenna and/or the additional antennas incorporated in the antenna structure improves the overall antenna efficiency. Some embodiments provide additional electrical connections into a main antenna connector, while reducing the size of the overall antenna structure. Some embodiments also incorporate additional transmission lines into the overall antenna structure, thereby providing additional flexibility in designing the form of the radio, for example, by eliminating the need for side accessory connectors.
In the foregoing specification, specific embodiments have been described. However, one of ordinary skill in the art appreciates that various modifications and changes can be made without departing from the scope of the invention as set forth in the claims below. Accordingly, the specification and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of present teachings.
The benefits, advantages, solutions to problems, and any element(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential features or elements of any or all the claims. The invention is defined solely by the appended claims including any amendments made during the pendency of this application and all equivalents of those claims as issued.
Moreover in this document, relational terms such as first and second, top and bottom, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms “comprises,” “comprising,” “has”, “having,” “includes”, “including,” “contains”, “containing” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises, has, includes, contains a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by “comprises . . . a”, “has . . . a”, “includes . . . a”, “contains . . . a” does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises, has, includes, contains the element. The terms “a” and “an” are defined as one or more unless explicitly stated otherwise herein. The terms “substantially”, “essentially”, “approximately”, “about” or any other version thereof, are defined as being close to as understood by one of ordinary skill in the art, and in one non-limiting embodiment the term is defined to be within 10%, in another embodiment within 5%, in another embodiment within 1% and in another embodiment within 0.5%. The term “coupled” as used herein is defined as connected, although not necessarily directly and not necessarily mechanically. A device or structure that is “configured” in a certain way is configured in at least that way, but may also be configured in ways that are not listed.
It will be appreciated that some embodiments may be comprised of one or more generic or specialized processors (or “processing devices”) such as microprocessors, digital signal processors, customized processors and field programmable gate arrays (FPGAs) and unique stored program instructions (including both software and firmware) that control the one or more processors to implement, in conjunction with certain non-processor circuits, some, most, or all of the functions of the method and/or apparatus described herein. Alternatively, some or all functions could be implemented by a state machine that has no stored program instructions, or in one or more application specific integrated circuits (ASICs), in which each function or some combinations of certain of the functions are implemented as custom logic. Of course, a combination of the two approaches could be used.
Moreover, an embodiment can be implemented as a computer-readable storage medium having computer readable code stored thereon for programming a computer (e.g., comprising a processor) to perform a method as described and claimed herein. Examples of such computer-readable storage mediums include, but are not limited to, a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a ROM (Read Only Memory), a PROM (Programmable Read Only Memory), an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory) and a Flash memory. Further, it is expected that one of ordinary skill, notwithstanding possibly significant effort and many design choices motivated by, for example, available time, current technology, and economic considerations, when guided by the concepts and principles disclosed herein will be readily capable of generating such software instructions and programs and ICs with minimal experimentation.
The Abstract of the Disclosure is provided to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, it can be seen that various features are grouped together in various embodiments for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separately claimed subject matter.
