Abstract: A wireless signal level indicator includes at least an antenna signal processing module, a signal level indicator (SLI), and a power supply module. This invention provides an innovative two-stage filtering technique; first, the low-pass filter (LPF) of the antenna signal processing module is used to filter out high-frequency signals that are not used by digital televisions; then a high-frequency pass filter (HPF) of the signal level indicator is used to filter out low-frequency signals that are not commonly used by digital televisions. In this way, the signal of the usual range of the general digital television can be selected, and this invention can produce a low signal loss and low noise factor wireless signal level indicator at low cost.

Abstract: A car antenna assembly includes an outer cover, an antenna unit, a fixing seat, a locking bar, a control board, and a base. The antenna unit is made of a metallic strip which is bent freely to form a plurality of antenna elements which are connected successively. The outer cover covers the antenna unit and the fixing seat. Thus, the height of the antenna elements is increased gradually from the front end toward the rear end of the antenna unit, while the antenna elements have a constant spacing so that the bandwidth of the antenna elements is increased so as to increase the receiving effect of the AM and FM signals. The car antenna assembly has a shark fin shape to reduce the air drag and air shear noise.

Abstract: An antenna connection device contains a receiving end, a discharge tube, a first aluminum box, a second aluminum box a copper post, and a device end. The receiving end is a connector for connecting with an antenna and has a copper post extending outwardly from an inner side thereof so as to connect with the discharge tube, and a distal end of the copper post couples with a capacitance so as to conduct electricity to the device end, between the receiving end and the device end are defined a first recess and a second recess corresponding to the first aluminum box and the second aluminum box, wherein between the first recess and the second recess is defined a quadrilateral space so that the copper post, the discharge tube, and the capacitance are covered in the first aluminum box and the second aluminum.

Abstract: A car antenna assembly includes an outer cover, an antenna unit, a fixing seat, a locking bar, a control board, and a base. The antenna unit is made of a metallic strip which is bent freely to form a plurality of antenna elements which are connected successively. The outer cover covers the antenna unit and the fixing seat. Thus, the height of the antenna elements is increased gradually from the front end toward the rear end of the antenna unit, while the antenna elements have a constant spacing so that the bandwidth of the antenna elements is increased so as to increase the receiving effect of the AM and FM signals. The car antenna assembly has a shark fin shape to reduce the air drag and air shear noise.

Abstract: An infrared remote control switching method includes providing a hand-held device, loading a program into the hand-held device, driving the program in the hand-held device to select and set a desired electronic product, driving the hand-held device into a remote control mode, and transmitting an infrared signal through an adapter to the desired electronic product so as to remote control the desired electronic product. Thus, the program is loaded into the hand-held device in a wireless transmission manner and can be updated to search the codes corresponding to and compatible with various electronic products so that the hand-held device can be reset and converted into a universal remote controller which can be used to remote control various electronic products through the adapter.

Abstract: An antenna device includes a support pole, a fixing seat mounted on the support pole, at least one clamping member mounted on the support pole and combined with the fixing seat by at least one locking bolt, and an antenna box mounted on the fixing seat. The fixing seat is provided with a square mounting sleeve which has a mounting chamber and two opposite fixing holes. The antenna box has a square insertion block inserted into the mounting chamber. The insertion block has a plurality of adjusting holes. Thus, the orientation of the antenna box is adjustable so that the antenna box can be disposed at a horizontal position or a vertical position so as to receive a wireless signal exactly and clearly.

Abstract: An antenna device includes a support pole, a fixing seat mounted on the support pole, at least one clamping member mounted on the support pole and combined with the fixing seat by at least one locking bolt, and an antenna box mounted on the fixing seat. The fixing seat is provided with a square mounting sleeve which has a mounting chamber and two opposite fixing holes. The antenna box has a square insertion block inserted into the mounting chamber. The insertion block has a plurality of adjusting holes. Thus, the orientation of the antenna box is adjustable so that the antenna box can be disposed at a horizontal position or a vertical position so as to receive a wireless signal exactly and clearly.

Abstract: The device contains a base, a circuit board, a protective cover, a control panel, and top cover. The base accommodates the circuit board having a touch-sensitive IC, a PIN diode, and other common electronic elements. The circuit board is covered by the protective cover and the control panel is positioned on top of the protective cover with a gap therebetween through which a cable connecting the control panel and the circuit board passes. The control panel has a number of copper foils functioning as electrodes. The top cover has a number of touch contacts corresponding to the copper foils. An adhesive tape is positioned between the touch contacts and the cooper foils so that the former is not in direct with the latter.