The antenna of cell phone jammer can be used with the patch antenna

The current status of the prison phone shielding the Ministry of Justice in accordance with national regulations and spirit of the document request, the national prison system in recent years for the establishment of mobile phone screen with urgent needs, many prisons have to prepare project has been approved or under construction. The cooling system with 1 fan is included for the antenna of cell phone jammer .However, due to many reasons, the Panel found that the effectiveness of the country a large number of poor prison shielding system, which some systems Although construction is completed, but can not function properly, a prison and engineering business a thorny issue. The effectiveness of the prison phone system, poor shielding performance of three main. The effectiveness of the prison phone system, poor shielding performance of several key 1) the shielding effect of shielding region lax, there are a lot of blind spots, dead ends, some to the kennel area near the window there is a particular area of the base station can be connected to the direction of the side lot cell phones, and even some antenna (equipment) can call, the opportunity for criminals, would not achieve full stop illegal use of mobile phones purposes.The antenna of cell phone jammer can be used with the patch antenna. 2) should not be a serious interference shielding region: two outside the prison office, armed police and other regions was severely disrupted, affecting normal life and work of staff; more serious interference range will be further expanded, and even interfere with the base station to a standstill near the district, factories, large-scale units are strong, people will anger quite heavy; by residents and Mobile, China Unicom, Telecom and other operations of the complaint, and local radio management department of the prison to work these issues to bring some negative effects , disrupting the harmonious relations between police and the public. The directional blocking area of cell phone jammer is 60-80m.3) The system is running stable: good times and bad, is not high reliability, fault-prone. In particular, summer and fall, a large number of equipment failures damage, even after the replacement of large equipment are still unable to achieve the desired shielding effect; for people with ongoing maintenance, labor life a waste of money, just like chicken. The poor performance of the prison phone system several shielded main four.  cell phone jammer can be used in the hospitals and medical centers or places where medical equipments should not be interrupted by the cellular signal.The poor performance of the prison phone system shielded a few main reasons First, the subjective awareness of mobile shielding system 1) lack of proper shielding the prison system and a comprehensive understanding of the common market between the civilian nature of    cell phone jammer difference. The prison system is a set of shielded communication technology, radio transmitter receiver technology transfer, electronic warfare technology, equipment, comprehensive technical and performance indicators for the perfect combination of product, not the general civilian use a large number of mobile phone jammers easy distribution to use. 2) lack of system cost and input-output ratio of the integrated and scientific analysis.  cell phone jammer is applicable to theaters, cinemas, museums, art galleries and so on. People often make the minimum investment funds to produce the greatest results, however, ignored the basic technology in the product a reasonable investment. As well as procurement can not use a fundamental technical requirements for low-end prison project equipment products, is intrinsically flawed, leaving endless risks for the future.