Abstract: A call path display telephone system includes an establishment telephone and a user telephone. The establishment telephone includes a memory, communication module and controller. The user telephone includes a memory, microphone, speaker, keypad, communication module, controller, and a visual input/output module. The desired menu options for a call path are visually displayed to a user to allow the user to more rapidly and efficiently navigate through the call path menu. Unlike prior-art voice based systems, it is not necessary to sequentially listen to all available options; they can be rapidly viewed visually and selected as desired.

Abstract: A cordless modem comprises a radio pair interfaced to a standard data/fax modem which allows a user of a personal computer to wirelessly connect to a telephone line. One end of the radio pair is a remote unit interfaced to the modem contained within the PC while the other end is a base unit connected to a standard telephone wall jack. The base unit can selectively discriminate and adjust for signals received from a telephone voice handset or data signals received from the cordless modem remote unit. Upon receiving an off-hook signal or an incoming call signal, the base unit identifies the type of data (i.e., voice or computer modem data) and adapts accordingly by placing an FM modulator in either of a narrow band deviation or a wide band deviation covering the required range of the particular signal combined with local echo. That is, when voice data is present, a low deviation, narrow filter combination is selected.

Abstract: Disclosed is a dipole array antenna that is particularly useful at UHF and microwave frequencies. In an exemplary embodiment, the antenna is comprised of two dipole radiating elements--a driven dipole of length L1 and an unfed element closely spaced from the driven element, of length L2. The ratio L1/L2 is at least 1.1, and may be optimally set at about 1.3. Preferably, at a reference frequency in which VSWR is minimum, the length L2 of the unfed element is less than 0.45 wavelengths, and optimally, is in the range of 0.39-0.42 wavelengths, with dipole spacing in the range of 0.07 to 0.11 wavelengths at the reference frequency. Advantageously, the antenna exhibits a low VSWR in a 50 ohm system over an operating frequency band, whereby a matching network can be avoided. High gain and front-to-back ratio is also realizable while antenna size is kept small.

Abstract: A cordless modem comprises a radio pair interfaced to a standard data/fax modem which allows a user of a personal computer to wirelessly connect to a telephone line. One end of the radio pair is a remote unit interfaced to the modem contained within the PC while the other end is a base unit connected to a standard telephone wall jack. This arrangement allows the user the convenience and freedom of using a PC, laptop, personal digital assistant, etc., within several hundred feet of a phone jack without being encumbered by a cord. A warning alarm on the remote unit informs the user when the signal strength between the radio pair is below a threshold value. Additionally, the base unit may be equipped with two spatially separated antennas to help mitigate the effects of signal fading.

Abstract: The invention is a novel antenna configuration that has a substantially smaller size than existing antennas tuned to a given frequency. Compact size is provided without substantial loss in performance, making the antenna particularly suitable for hand-held devices. An antenna in accordance with the invention is preferably situated on an FR4 substrate, and includes a dipole having first and second pairs of copper radiating strips, one pair on each of the top and bottom surfaces of the substrate. Each radiating strip in a pair has a copper conductive strip coupled thereto, the strip of one radiating element being situated on the same surface of the substrate as the respective strip, with the conducting element of the other radiating strip being disposed on the opposite surface of the substrate. The effect of the configuration is to lengthen the radiating strips without an increase in substrate dimensions, thereby allowing tuning to low frequencies for a given substrate size.

Abstract: The antenna is a hybrid microstrip and reflector antenna having a planar patch antenna mounted to an upper surface of an insulated planar substrate. The substrate is coupled to a ground plane by one or more insulated couplers so as to form an airgap therebetween. A coaxial cable connectable to a transceiver is coupled to the bottom surface of the ground plane at the outer conductor thereof and the inner conductor is coupled to a feed pin which passes through the ground plane and protrudes through the surface of the patch. The feed pin is secured to the patch by soldering.