| Hytera Communications Corp., Ltd. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120119974 | DUAL FREQUENCY ANTENNA - A dual frequency antenna is provided, which includes a helical radiator electrically connected to a main body via a feed point of the main body, a first radiator for generating resonance is formed on the lower portion of said radiator, a second radiator for generating resonance is formed on the upper portion of said radiator, wherein the resonance frequency of the second radiator is higher than that of the first radiator, and the helical pitch of the second radiator is larger than that of the first radiator. The dual frequency antenna easily enables tuning in a whole UHF frequency band, and work performance of an upper semi-sphere of the dual frequency antenna is improved in a GPS frequency band. | 05-17-2012 |
| 20120075165 | DUAL FREQUENCY ANTENNA WITH WIDE FREQUENCY - A dual frequency antenna with wide frequency includes an inner radiator in helical structure, which is electrically connected with a host by a feeding point of the host, and an outer radiator in helical structure in which the inner radiator is packed. The inner radiator includes a first radiating unit located at the lower part for generating resonance and a second radiating unit located at the upper part. The resonant frequency of the second radiating unit is higher than that of the first radiating part; the height of the helical structure of the outer radiator is less than the total height of the inner radiator. The performance of dual frequency antenna can better focus on the upper hemisphere, and the bandwidth of the dual frequency antenna is wider in the ultra high frequency (UHF) frequency band. | 03-29-2012 |
| 20120002684 | DMR Private Network Communication Implementation Method, Terminal, Relay Station and System - The present invention relates to a private network communication technology, and it provides an implementation method, terminal, relay station and system for DMR private communication with respect to the existing defects that each of the communication terminals can only communicate with each other by using the same time slot in a group, and thereby a frequency width of 12.5 KHz can not be used sufficiently. The DMR private network communication terminal includes a communication module for receiving CACH information, receiving and transmitting DMR private network communication, a synchronization module for establishing synchronization and determining which time slot the received DMR private network communication occupies based on the received CACH information; and controlling the communication module to make a response for the received DMR private network communication in the time slot. The present invention further provides an implementation method, relay station and system for DMR private network communication. Each path of DMR private network communication only occupies one time slot, the case of occupying different time slots at different time can be avoided. In this case, the stability of the idle time slot can be ensured, and other DMR private network communication terminals can initiate new DMR private network communication by locking unoccupied idle time slot; thereby achieving a full usage of the frequency width of 12.5 KHz. | 01-05-2012 |
| 20110216746 | PRIVATE NETWORK COMMUNICATION TERMINAL AND METHOD FOR REALIZING PRIVATE NETWORK COMMUNICATION - The present invention relates to communication technologies and provides a private network communication terminal and a method for realizing private network communication, In the invention, one private network communication can only be performed in one time slot with a fixed location in a DMR TDMA frame, so that other mobile communication terminals that do not participate in the private network communication can determine an unoccupied time slot in advance, thereby they can initiate a new private network communication with the unoccupied time slot. | 09-08-2011 |
| 20110205939 | Method for Implementing Radiophone Based Conference Call and Dynamic Grouping - The present invention provides a method for implementing a radiophone based conference call and dynamic grouping, which generally includes selecting a dynamic grouping function and members of an intended group through a man-machine interface of a radiophone, generating a control packet in a coding format and an extensible interface, the coding format and the extensible interface being inherent to a preset protocol stack module, and then transmitting the control frame in a control frame to a corresponding receiving end, and the receiving end upon reception of the control frame decodes the control frame and initiates a frequency modification module to modify frequency modification information by adding the group ID of the intended group. The radiophone in the present invention can perform a scheduling function, and time can be saved in an emergency for rapid and convenient dealing with an incident. | 08-25-2011 |
| 20110086536 | CONNECTOR - A connector comprises a connector body ( | 04-14-2011 |
