جهاز التشويش على المشوشين في الصلاه !!

الجزائر- للحفاظ على الطمأنينة وأجواء الخشوع في المساجد خلال شهر رمضان، لجأ عدد من مساجد الجزائر إلى استخدام أجهزة تشويش على الهاتف الجوال، بعد أن يئست إدارات المساجد من إلزام المصلين بإغلاقه.

هذا الجهاز اسمه jamming mobile

جهاز التشويش هو عبارة عن جهاز الكترونى يرسل موجات كهرومغناطيسية على نفس تردد الرادار او الصاروخ الرادارى بحيث تظهر عدة اهداف على شاشة الرادار او حتى لا يظهر على هدف.
و عادة يرسل جهاز التشويش على عدد من ترددات التى من المتوقع ان يستخدمها العدو و الطائرة التى تعمل على التشويش ترسل حزمة من الموجات ذات قوى مختلفة و ترددات مختلفة حتى تشتت موجات الرادار المعادى

A GSM Jammer is a device that transmit signal on the same frequency at witch the
GSM system operates, the jamming success when the mobile phones in the area where
the jammer is located are disabled.
Communication jamming devices were first developed and used by military. Where
tactical commanders use RF communications to exercise control of their forces, an enemy
has interest in those communications. This interest comes from the fundamental area of
denying the successful transport of the information from the sender to the receiver.
owadays the mobile jammer devices are becoming civilian products rather than
electronic warfare devices, since with the increasing number of the mobile phone users
the need to disable mobile phones in specific places where the ringing of cell phone
would be disruptive has increased. These places include worship places, university
lecture rooms, libraries, concert halls, meeting rooms, and other places where silence is
appreciated.
Mosques are example for the places were mobile jammer would be a great solution,
although mosques asks politely from prayers to disable their mobile phone during the
prayer , some people forget and the ringing phone of their mobile phone
become very annoying specially during the praying time.

Design and Implementation of GSM Mobile JAMMER
The Implementation of type "A" JAMMER is fairly simple, the block diagram for
this type is shown in figure (2), it shows the main parts which are: RF-section, IFsection,
and the power supply.

Figure 2: Block diagram of the mobile Jammer

1-RF-Section:
The RF-section is the most important part of the mobile jammer it consist of the
Voltage Controlled Oscillator (VCO), RF Power amplifiers, and the antenna. These
components were selected according to the desired specification of the jammer such
as the frequency range and the coverage range. Its important to note that all the
components used has 50 ohm input/output impedance, so 50 ohm microstrip was
needed for matching between the components. The width of the microstrip was
calculated using the following Equations for w/h >1: [4]


To obtain the desired output jamming power for coverage range of 20 m first we found
he jamming power required at the mobile receiver "Jr", knowing that SNRmin = 9 dB
and Smax = -15dBm (i.e. worst jamming case). then from
SNRmin = S/J, where S = the signal power, J = the jamming power
Jr = -24dBm, then by invoking the free space path loss equation:
F = 32.45 + 20 log(f*D), where "Ds" is distance in Km and "f" is frequency in MHz ,
for 20 m the loss equals 58 dB hence the jammer should transmit a jamming signal with
power equals : 58 dB -24dBm = 34dBm, to sustain a 20m jamming
نقلاً عن شيخنا جوجل (عجّل الله فرجه !! )

والدائره الكهربائيه تاعها جاهزه !! بس إذا فيه متابعه منكم

أ.هـــ

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