Coaxial cable connector system and method

A connecting device comprising a body having a threaded portion and a sleeve portion. A plurality of coaxial receptacles disposed in the threaded portion, each receptacle formed to couple with element of a coaxial cable connector, and a plurality of coaxial mounts disposed on the sleeve end. The coaxial mounts may be coupled to coaxial leads with each lead having a mini-connectors. The body is substantially similar to a type-n connector and provides for easy coupling of multiple coaxial cables within a single connector housing.

FIELD OF THE INVENTION

The disclosure herein relates generally to device for connecting coaxial cables, specifically for connecting a plurality of coaxial cables using a single connector housing.

BACKGROUND

Coaxial cables are an ideal medium for transmitting radio frequency (“RF”) and microwave signals. Such cables are defined as an electrical cable with an inner, center conductor surrounded by 3 tubular, coaxial layers being, from innermost to outer most, a dielectric layer, a conductive layer and an insulating layer. Generally, the center conductor is operable for the transmission of the RF signal, and the conductive layer (also known as the “shield”) provides the return electrical path to the RF power stage. The cables provide both good signal isolation and low signal loss. Due to the wide spread acceptance and use of coaxial cables, many types of connectors are in use. A number of improvements have been made recently to coaxial connectors, predominantly though, for conventional, single conductor coaxial applications.

The ability to carry signals over a wide frequency spectrum is an important goal for coaxial cables. Accordingly, development of cables capable of handling a wide band width is desired in the art. Alternatively, a thin, flexible coaxial cable could be employed in a parallel configuration in effect allowing each coaxial cable to operate in a different frequency range. Bundles of parallel cables would allow higher bandwidth with less interference between channels and frequencies.

Connectors for accommodating coaxial bundles should be easy to assemble with conventional tools, well shielded and maintain a unique orientation. High density connectors for the transmission of RF are known in the art. (See for example US Patent publication 2008/0205829.) While, these connectors may be well suited for many applications, they do not provide for adequate shielding for RF applications. Consequently, what is needed is connector capable of accommodating multiple RF coaxial cables.

SUMMARY OF THE DISCLOSURE

Disclosed herein is a system and method for a connecting device comprising a body having a threaded portion and a sleeve portion. A plurality of coaxial receptacles disposed in the threaded portion, each receptacle formed to couple with element of a coaxial cable connector, and a plurality of coaxial mounts disposed on the sleeve end. The coaxial mounts may be coupled to coaxial leads with each lead having a mini-connectors. The body is substantially similar to a type-n connector and provides for easy coupling of multiple coaxial cables within a single connector housing.

The design and use of the invention, however, together with additional objectives and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.

DESCRIPTION

Nomenclature

The term “threaded surface” generally refers to a surface having a raised groove-like structure for receiving a reciprocally threaded mating component. A threaded surface may be either male or female depending upon the application.

The term “bulkhead” generally refers to a surface that a connecting device is affixed to. Conventionally, connecting devices have a portion passing through a bulkhead to provide access from an opposite side of a bulkhead.

The term “coaxial element” generally refers to the center conductor, dielectric layer, and conductive layer of a coaxial cable or fitting. A coaxial element may also include the outermost insulating layer.

The term “lead” or leads” generally refer to a length of coaxial cable having one end affixed to an electrical circuit.

The term “mini-connector” generally refers to a connector that is affixed to the distal end of the lead allowing the lead to be connected to other components such as antenna, transmitters and receivers. Mini-connectors are conventionally known in the art. Examples of mini-connectors are micro-coaxial (MCX) and micro-miniature coaxial (MMCX) and the like.

The term “mini-connector center conductor” generally refers to the center conductor of a mini-connector.

The term “mini-connector dielectric” generally refers to the dielectric within a mini-connector.

The term “mini-connector shield” generally refers to the shield of a mini-connector.

The term “coaxial receptacle” generally refers to the collection of coaxial elements generally comprising a center conductor and a dielectric element, disposed to allow for connection and removal of electrically coupled components.

The term “Type N connector” generally refers to a threaded RF connector used to join coaxial cables. Type N connectors are well known in the art. There are two families of Type N connectors: Standard N (coaxial cable) and Corrugated N (helical and annular cable). Their primary applications are the termination of medium to miniature size coaxial cable, including, but not limited to, RG-8, RG-58, RG-141, and RG-225.

The term “RF” or “radio frequency” generally refers to, but is not limited to, electromagnetic energy having a frequency between 1 kHz and 10 GHz.

The term “WiFi” generally refers to, but is not limited to a wireless LAN (local area network).

The term “transmitter” generally refers to an electronic circuit for providing RF energy. Transmitters are often coupled to information systems with the effect of transforming digital information to RF for use in a wireless network.

The term “antenna” generally refers to a device for radiating or receiving RF. Antennas are generally coupled to a transmitter, receiver or both.

The term “receiver” generally refers to an electronic circuit that can convert RF to useful information. Receivers are often coupled to information systems with the effect of transforming RF information to digital information for use in a wireless network.

DETAILED DESCRIPTION

Read this application with the following terms and phrases in their most general form. These definitions are provided to facilitate a clear understanding of the present invention. The general meaning of each of these terms or phrases is illustrative, and not in any way limiting.

FIG. 1illustrates a side view and a top view respectively of one aspect of a coaxial cable connector system. In theFIG. 1A, a body100having a threaded side160is disposed for mating with multiple coaxial cables. The body100is preferably made from electrically conducting material such as stainless steel. The body100is substantially circular, but may include a flat gripping surface110. The threaded side160has a threaded surface120for accepting a gripping nut130. The body has a sleeve side170having an outer shell140. Disposed in the center of the body is a dielectric material (not shown) for supporting elements within the threaded side160and the sleeve side170. The sleeve side170may be formed differently than shown by forming it with a second threaded surface or a quick-disconnect connector form. The shell140includes an alignment dimple or “key”150dispose along the sleeve side, although the inventors contemplates effectuating the sleeve side170with or without the key150or by disposing the key150in alternative positions.

References in the specification to “one embodiment”, “an embodiment”, “an example embodiment”, etc., indicate that the embodiment described may include a particular feature, structure or characteristic, but every embodiment may not necessarily include the particular feature, structure or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one of ordinary skill in the art to effectuate such feature, structure or characteristic in connection with other embodiments whether or not explicitly described. Parts of the description are presented using terminology commonly employed by those of ordinary skill in the art to convey the substance of their work to others of ordinary skill in the art.

FIG. 2illustrates the end view of the threaded side160of a coaxial cable connector system. Within the threaded side is a cavity (“threaded cavity”) containing multiple coaxial receptacles222and224. In theFIG. 2A, the center conductor receptacle may be comprised of a “pin” to effectuate a male connector, or may be formed using a hollowed out protrusion for receiving a pin with the effect of forming a female connector. Receptacle222is formed as a male receptacle and receptacle224is formed as a female receptacle. Both the receptacle222and224are electrically isolated from the connector housing226by a dielectric layer226which surrounds and forms an integral part of each receptacle222and224. A female positioning structure220is disposed off center with the effect that an opposite gender positioning structure, when connected acts to align the receptacles. Positioning structures may be either male or female.

In operation each coaxial element within a coaxial receptacle is formed to match and join with the elements of the coaxial cable coupled to it. Thus in theFIG. 2Acomplementary receptacles and a complementary positioning structure would be disposed to provide for electrical connectivity to a similarly formed coaxial cable connector. In theFIG. 2A, the connector body228could be constructed of an electrical conducting material and provide for electrical shield around the coaxial receptacles. In theFIG. 2A, the receptacles222and224would physically “share” the connector body228as a common shield although in effect the electrical shielding for each receptacle would be effectuated by the position of the receptacle in relation to any other receptacles and the connector body228. Coaxial receptacles and connector materials and shapes could be formed to effectuate optimal impedance matching at anticipated operating frequencies.

FIG. 2Bshows a possible alternative embodiment to the threaded side160of a coaxial connector system. In theFIG. 2Bthe coaxial receptacles are formed to allow for each receptacle to include a separate shield. Each coaxial element has a center conductor receptacle210. The center conductor receptacle210may be comprised of a “pin” to effectuate a male connector, or may be formed using a hollowed out protrusion for receiving a pin with the effect of forming a female connector. The center conductor receptacle210is surrounded by the dielectric receptacle230to electrically isolate the center conductor receptacle210from a shield receptacle240. The dielectric receptacle230is surrounded by the shield receptacle240. Additionally, there may be an optional surrounding layer of the insulator material250. The center conductor receptacle is contiguous through the coaxial cable connector to couple to a corresponding element on the sleeve side170. Likewise the shield receptacle may be contiguous through the coaxial cable connector to a corresponding element on the sleeve side170. Any gaps between receptacle elements within the threaded side may be filled with non-conductive filler material. An alignment receptacle220is disposed off center as an asymmetric positioning element.

FIG. 3illustrates the sleeve side170of the coaxial cable connector system. Within the sleeve side is a cavity (“sleeve cavity”) having multiple coaxial mounts disposed for receiving a wire or other electrical conductive element. A center conductor mount310is surrounded by dielectric330to electrically isolate the center conductor mount310from surrounding material. The center conductor mount310is electrically coupled to a respective receptacle element on the reverse side of the connector, and may be formed form the same material. In theFIG. 3Athe center conductor mounts310receive a conducting wire from a coaxial cable, and the shields form the coaxial cable are electrically connected to the connector body. Thus the center conductor mounts would physically share the connector body as a common shield although in effect the electrical shielding for each receptacle would be effectuated by the position of the receptacle in relation to any other receptacles and the connector body.

In theFIG. 3B, one alternative design is illustrated. In theFIG. 3Bthe center conductor mounts may be surrounded by individual the shielding340which would in turn connect to a coaxial lead. There may also be an optional surrounding layer of the insulator receptacle350. The gaps between coaxial portion within the sleeve side are filled with non-conductive filler370. A dimple or other structure (not shown) may be disposed off center on the sleeve side140as an asymmetric positioning element. Alternatively, the sleeve side could be replaced with a threaded element and an alignment receptacle could be used instead of a dimple. The coaxial portion elements could be tiered to match a connecting coaxial bundle. Alternatively, the coaxial portion elements could be individual leads protruding from the sleeve side of the connector.

FIG. 4illustrates the sleeve side in which multiple coaxial mounts in the sleeve side140are coupled to leads410of indeterminate length, protruding from the sleeve cavity on the sleeve side140. The leads410comprise a center conductor surrounded by 3 tubular, coaxial layers (not shown) being, from innermost to outer most, a dielectric layer, a conductive layer and an insulating layer. A distal mini-connector415is affixed to the distal end of the lead410and the proximal end of the lead is affixed to a coaxial mount. The center conductor portion is electrically coupled through the lead410to the mini-connector center conductor420. The dielectric portion is electrically coupled through the lead410to the mini-connector dielectric430. A shield mount may electrically coupled to the mini-connector shield440or alternatively the shield may be connected to the connector body. The shield is contiguous with the sleeve side140or the mini-connector shield440.

In theFIG. 4, each coaxial element within the coaxial receptacle may be tiered to mate with the coaxial elements of a corresponding coaxial cable. The center conductor receptacle mates with the center conductor of a coaxial cable when the two conductors are held in substantially close proximity to ensure electrical conduction. If employed, the shield receptacle mates with the shield of a coaxial cable when the two conductors are held in close enough proximity to ensure electrical conduction. The dielectric receptacle mates with the dielectric of a coaxial cable when the two insulators are held in close proximity. The coaxial elements within a coaxial receptacle are coupled to their corresponding coaxial elements within a coaxial mount. However, non-conductive elements within a coaxial receptacle may closely align with; though not necessarily contact the corresponding elements of an attached coaxial cable or the coaxial portion.

Similarly, each coaxial element within the coaxial mount may be tiered to mate with corresponding coaxial elements of a coaxial cable. The conductor mount mates with the center conductor of a coaxial cable when the two conductors are firmly held in close enough proximity to ensure electrical conduction. The shield mount, if used, mates with the shield of a coaxial cable when the two conductors are firmly held in close enough proximity to ensure electrical conduction. The dielectric mount mates with the dielectric of a coaxial cable when the two insulators are firmly held in close proximity. The coaxial elements within a coaxial receptacle contiguously or continuously adjoin to the corresponding coaxial elements within a coaxial mount. Non-conductive elements within a coaxial portion may closely align with, though not necessarily connect to, the corresponding elements of an attached coaxial cable.

A plurality of coaxial receptacles are disposed on the end of the threaded side with a substantially equal number of coaxial mounts arrayed on the end of the sleeve side170of the coaxial cable connector system.

One having skill in the art will recognize that the design can be effectuated with a coaxial receptacle comprised of a two-tier opening similar to a conventional type N connector. The lower, center tier is a sheath to accept and contact the exposed center conductor of a coaxial cable, the floor of the upper tier is dielectric, the wall of the upper tier is composed of the shield receptacle which is exposed to make contact the exposed shield of the coaxial cable.

The threaded side may be a male thread and coaxial cables, each prepared to mate with a coaxial receptacle are within a bundle such that all the ends are disposed within a female connector. This coaxial cable bundle can then be attached to the coaxial connector system by pressing the threaded side of the coaxial cable connector system into the female connect, ensuring the alignment pin of the female engages the recess in the male end, then tightening the female connector on the male thread. In another embodiment, the threaded side is a female thread and has no gripping nut or flat gripping surface, and the cable bundle is disposed in a connector having a male thread.

Alternatively, the sleeve portion on the sleeve side is a quick disconnect coupling. In this case, the coaxial cables, each prepared to mate with a coaxial portion, are within a bundle such that all the ends are disposed within a mating quick disconnect coupling. This coaxial cable bundle can then be attached to the coaxial connector system by pressing the quick disconnect side of the coaxial cable connector system into the mating quick disconnect of the cable bundle, ensuring the alignment dimple of the quick disconnect end of the coaxial cable connector system aligns with the mating groove of the mating quick disconnect of the cable bundle, then tightening the quick disconnect fittings.

As another alternative, each coaxial portion is affixed to a coaxial lead as shown in theFIG. 4. A coaxial connector is attached to each lead. These connectors can then be connected to other devices including, but not limited to receivers, transmitters or antennas. A plurality of antennas, for example, may be connected severally to a plurality of coaxial cables through the coaxial connector system, each carrying the same or different frequency. The coaxial connector system may also have a common ground plane to which the coaxial receptacles and coaxial portions are jointly connected.

One having skill in the art will also recognize that differing physical connections could be used. For example, the male threaded surface does not require a flat gripping surface, or the sleeve side does not have an alignment dimple, or the threaded end does not have an alignment receptacle. An asymmetric arrangement of the coaxial receptacles and coaxial portions would provide for unique alignment.

The invention described herein addresses the deficiencies of previously described devices. In the present invention, a bundle of coaxial cables can be quickly attached with a quick disconnect. Through connection of the shield of each coaxial cable to a common ground plane within the connector through to the ground shield of the quick disconnect, shield continuity is maintained for each coaxial cable.