The voltage monitoring circuit includes a first multiplexer, a controller, a resistor-network circuit and a first comparison circuit. The first multiplexer receives a plurality of first subject voltages. The controller controls the first multiplexer to output one of the plurality of first subject voltages and generates a testing signal including a plurality of electric potentials. The controller is configured to output the plurality of electric potentials switching according to a switch command. The resistor-network circuit is configured to sequentially generate a plurality of first reference voltages according to switches of the plurality of potentials. The first comparison circuit is configured to sequentially compare each of the plurality of first reference voltages to the first subject voltage for sequentially outputting a plurality of first comparing results and sending the plurality of first comparing results to the controller so that a voltage value of the first subject voltage is determined.

The voltage monitoring circuit includes a first multiplexer, a controller, a resistor-network circuit and a first comparison circuit. The first multiplexer receives a plurality of first subject voltages. The controller controls the first multiplexer to output one of the plurality of first subject voltages and generates a testing signal including a plurality of electric potentials. The controller is configured to output the plurality of electric potentials switching according to a switch command. The resistor-network circuit is configured to sequentially generate a plurality of first reference voltages according to switches of the plurality of potentials. The first comparison circuit is configured to sequentially compare each of the plurality of first reference voltages to the first subject voltage for sequentially outputting a plurality of first comparing results and sending the plurality of first comparing results to the controller so that a voltage value of the first subject voltage is determined.

The present invention relates to a 33 Butler matrix, comprising a first directional coupler, a second directional coupler, a third directional coupler, a first fixed phase shifter, a second fixed phase shifter and a third fixed phase shifter; and also relates to a 56 Butler matrix, comprising a first 33 Butler matrix, a second 33 Butler matrix, a fourth directional coupler, a fifth directional coupler, a power divider, a fourth fixed phase shifter and a fifth fixed phase shifter. The 33 Butler matrix and the 56 Butler matrix provided in the present invention have the features of small size, wide frequency band, low loss, high isolation and stable performance, fill the blank of specific technical schemes about the 33 Butler matrix and the 56 Butler matrix in the prior art, and have broad application prospects and great value.

The present invention relates to a 33 Butler matrix, comprising a first directional coupler, a second directional coupler, a third directional coupler, a first fixed phase shifter, a second fixed phase shifter and a third fixed phase shifter; and also relates to a 56 Butler matrix, comprising a first 33 Butler matrix, a second 33 Butler matrix, a fourth directional coupler, a fifth directional coupler, a power divider, a fourth fixed phase shifter and a fifth fixed phase shifter. The 33 Butler matrix and the 56 Butler matrix provided in the present invention have the features of small size, wide frequency band, low loss, high isolation and stable performance, fill the blank of specific technical schemes about the 33 Butler matrix and the 56 Butler matrix in the prior art, and have broad application prospects and great value.

On startup, a mobile station application will determine the current carrier network and submit a query to an application server that will return the correct location server configuration for the specified network. This information will be used on the mobile station to dynamically configure the device through the available GPS chipset API.

A millimeter wave mobile phone antenna structure including: a plurality of antenna elements, each antenna element having a port; a plurality of signal acquisition units, each having a mixer and an analog-to-digital converter to produce a digital sampled signal of a sub-carrier signal output by each port; and a baseband signal processor, used for multiplying the digital sampled signal of each sub-carrier signal with a real time channel frequency response related weighting function and sum up the products to obtain a total output value of the antenna structure. The difference between the antenna structure of the present invention and the current millimeter-wave antenna structure of mobile phones is that: the present invention uses antenna elements instead of antenna arrays; and the antenna structure of the present invention provides multi-port output signals, rather than a single output digital, to facilitate the adaptability of received signals combining on the baseband end.