Abstract: A low-visibility, fixed-tune, wideband, and field-diverse antenna provides cross-polarized fields enhancing signal communications but having helical antenna characteristics without severe circular polarization radiation thereby promoting a modern, futuristic, and disguised look for reliable communications. A generally flat, but helical, antenna is achieved in conjunction with a core substrate about which the antenna is wrapped, wound, or fixed. The core substrate, pitch or angle of the helix, length of the transmitting antenna, and copper traces thickness are chosen for a specific resonant frequency range. The length and width of the helix are chosen in order to dimension the helical antenna between its linear and circular polarization modes to thereby deliver field-diverse and cross-polarized transmission modes. In order to optimize the manufacturing process, holes may be created within the substrate.

Abstract: An antenna cover that can be fitted onto an existing antenna spring assembly. The antenna cover is constructed of a flexible and resilient material, with a base layer adapted to wrap around the bottom of an antenna spring assembly, the interior of said base layer defining an attachment aperture, a side wall coupled with the base layer and adapted to cover the spring section of an antenna spring, and a top portion coupled with the side wall and adapted to cover the top of the antenna spring assembly, the interior of said top portion defining a whip aperture. The antenna cover is fitted onto an existing spring assembly by inserting the spring into one of the cover's apertures and forcing the cover over the spring assembly until the cover is fully in place. Alternatively, some or all of the cover may be composed of heat shrinkable material, so that when the cover is moved into place on the spring assembly, heat is applied to shrink the cover to closely fit the spring assembly.

Abstract: Exemplary embodiments of mountable and adjustable antenna apparatuses and methods are disclosed. In one exemplary embodiment, a mountable and adjustable antenna apparatus includes a top housing member, a bottom housing member, and an antenna assembly being disposed within the top housing member. The top housing member is in rotatable relation to the bottom housing member. The antenna assembly is in fixed relation to the top housing member. The top housing member has an aerodynamic configuration for reducing drag on, and for eliminating fatigue as well as flutter of, the antenna assembly.

Abstract: Exemplary embodiments of mountable antenna apparatuses and methods are disclosed. In one exemplary embodiment, a mountable antenna apparatus generally includes a housing member, a bayonet adapter, and an antenna assembly disposed within the housing member. The housing member may include an aerodynamic configuration for reducing drag on and for eliminating or reducing fatigue as well as flutter of the antenna assembly. The aerodynamic configuration may include a feature such as an ogive, an ogivoid, a semi-ogivoid, a hemi-ogivoid, and a quasi-ogivoid.

Abstract: A low visibility, field-diverse, dual band antenna provides cross-polarized fields enhancing signal communications. A generally flat, but helical, antenna is achieved in conjunction with a core substrate about which the antenna is wrapped, wound, or fixed. The core substrate, pitch or angle of the helix, and length of the transmitting antenna are chosen for a specific two (2) selected resonant frequency. A two-pole low-pass filter may be used to achieve dual band transmission. The passive components are specifically selected to achieve two (2) resonant frequencies PCS/Cellular 821–896 MHz and 1850–1990 MHz. The length and width of the helix are chosen in order to dimension the helical antenna between its linear and circular polarization modes to thereby deliver field-diverse and cross-polarized transmission modes.

Abstract: A low visibility, field-diverse antenna provides cross-polarized fields enhancing signal communications. A generally flat, but helical, antenna is achieved in conjunction with a core substrate about which the antenna is wrapped, wound, or fixed. The core substrate, pitch or angle of the helix, and length of the transmitting antenna are chosen for a specific resonant frequency. The length and width of the helix are chosen in order to dimension the helical antenna between its linear and circular polarization modes to thereby deliver field-diverse and cross-polarized transmission modes. In order to optimize the manufacturing process, holes may be created within the substrate. These holes are plated with conducting material so that conducting foil on opposite faces of the substrate may be electrically connected. The holes may be offset according to the pitch of the helix.

Abstract: A low-profile antenna has increased broad-banding capacities as well as a lower radiation angle for enhanced cellular or mobile telephone wireless transmissions. Enhancing a basic PIFA antenna, a top metal radiator is notched so as to provide additional corners and greater perimeter length thereby enhancing the bandwidth capabilities of the antenna. Both ground and tuning tabs serve to enhance operational characteristics and a dielectric cover incorporating prismatic qualities serves to lower the radiation angle of transmission from approximately forty degrees (40.degree.) to twenty degrees (20.degree.). The prisms provide an operating radiation angle in the range of approximately seventy degrees (70.degree.) to twenty degrees (20.degree.).

Abstract: A low visibility, field-diverse antenna provides cross-polarized fields enhancing signal communications. A generally flat, but helical, antenna is achieved in conjunction with a core substrate about which the antenna is wrapped, wound, or fixed. The core substrate, pitch or angle of the helix, and length of the transmitting antenna are chosen for a specific resonant frequency. The length and width of the helix are chosen in order to dimension the helical antenna between its linear and circular polarization modes to thereby deliver field-diverse and cross-polarized transmission modes. In order to optimize the manufacturing process, holes may be created within the substrate. These holes are plated with conducting material so that conducting foil on opposite faces of the substrate may be electrically connected. The holes may be offset according to the pitch of the helix.

Abstract: A base station antenna includes a matching network that broadbands transmission without requiring adjustment. Using a one-quarter wavelength (1/4 .lambda.) or less sperrtopf sleeve in a coaxial arrangement, broadbanding is achieved by adding a second conductor parallel to the transmission line center conductor. A ring inductor is tapped at one end off-center by the second conductor. The inductor's step-up end is connected to the antenna with the primary end connected to the transmission line center conductor. Mutual inductance may be present, but is not required, between the transmission line center and second conductors. Fringing capacitance between the antenna and the sleeve establishes an "L" network in conjunction with the inductor. To protect the inductor from the elements, it is placed inside the antenna near the sleeve.

Abstract: A wide-banded mobile antenna enhancing signal transmission by broadening the effective transmission bandwidth. The wide-banded mobile antenna is interchangeable with currently existing mobile antennas as the two use connectors established by industry. An antenna matching network is situated within a protective housing having a metal shield. A toroidal inductor is serially connected with the antenna and creates a parasitic capacitance with the metal shield. The resulting network, including the antenna, is tuned. An antenna compensating network increases the bandwidth of the antenna with a parallel resonance network. The parallel resonance network has a capacitor and an inductor connected in parallel to the antenna and each other. The parallel resonance inductor is oriented so that the fields it generates are perpendicular to those of the antenna and the matching inductor to prevent coupling between the inductors.