![inssider 2 1 inssider 2 1](https://www.fileeagle.com/data/2016/06/Screenshot_0_inSSIDer.png)
The gap between substrate TLY-5 and copper was lead lower frequency when the gap size decreased shown in Figure 6. Figure 5 shows the gap size, w of the FSS square loop structure. It is also seen that a better band rejection performance can be achieved using a substrate of higher dielectric constant. A higher dielectric constant leads to a lower resonant frequency and a narrower bandwidth. It is observed that the dielectric constant of the substrate exhibits a great influence. Figure 4 shows the frequency response of the FSS for different values of epsilon, ε r. Accordingly, the frequency resonant will be sensitive to the substrate thickness. The dielectric constant becomes very sensitive to the substrate thickness. D IELECTRIC S UBSTRATES Dielectrics are often used to provide structural support or stabilizing the angular response of an FSS. Figure 3 shows the research measurement setup of apply the FSS structure to WLAN device. The setup of this project is used a wireless adapter transmits the WLAN signal to the netbook while the FSS structure is attach to the netbook.
![inssider 2 1 inssider 2 1](https://lh6.ggpht.com/-3QVEtlc60M8/T6CzFbrQqeI/AAAAAAABWew/r8ehy9V1PSI/s72-c/MetaGeek_inSSIDer-v2.1_thumb%25255B2%25255D.jpg)
The transmitter is wireless adapter (TP-link). The receiver WLAN device that used for this measurement is netbook (hp mini TU).
#Inssider 2 1 software#
V.C HECK S IGNAL P OWER U SING I N SSID ER 2.1 The insider 2.1 software is to check and analyse the result of WIFI signal Power that the netbook receive, the example result display was shown as Figure 9. The spectrum analyzer was connected to the receiver horn antenna where the spectrum analyzer shows the signal power in unit dBm at peak of 2.4GHz signal.
#Inssider 2 1 generator#
The signal generator output port was connected to the transmitter horn antenna to transmit the 2.4GHz signal to the FSS structure and the horn antenna receiver. This measurement was done in shielded room condition. The distance between the two horns antennas from the FSS structure are 300mm. The measurement setup for measure the signal power (in dBm) at receiver horn antenna when the 2.4GHz signal propagate through the FSS structure by using two horn antennas, Avantest R3131A spectrum analyzer (9khz -3Ghz), and Agilent Technologies E8267D signal generator (250khz -20Ghz). Hence, the FSS structure was measured by using two horn antennas. Without any external power, the FSS structure would not amplify the signal output. It does not need any SMA connector to supply power.
![inssider 2 1 inssider 2 1](https://cracx.com/wp-content/uploads/2017/10/inSSIDer-Office-4.4.0.6-Patch-Serial-Number-Download.png)
S IGNAL P OWER M EASUREMENT Due to the FSS structure that design in this process is a passive antenna. The simulation FSS structure was shown in Figure 2. The overall design of simulation and fabricated FSS structure size are 28 cm × 20 cm. This is because antenna was really sensitive and any small error will lead to undesired performance of FSS structure. The fabricated FSS structure must be accurate to avoid the FSS structure result to be inaccurate. The FSS structure attached with the WLAN application was tested. The result from measurement will be compared with the simulation and analysis will be done.
![inssider 2 1 inssider 2 1](https://bestwinsoft.com/images/stories/flexicontent/item_828_field_20/s_inssider_06.jpg)
The FSS structure that had been designed was also simulated using CST where it consists of the results of S-parameter, bandwidth, and resonate frequency. The FSS structure design is an array square loop. M ETHODOLOGY The designing and simulation of FSS structure was done using CST Microwave Studio.