CC-Antenna-DK and Antenna Measurements Summary
By Richard Wallace Keywords
•169 MHz (136 – 240 MHz) Antenna •315 MHz (273 – 348 MHz) Antenna •433 MHz (387 – 510 MHz) Antenna •868 MHz (779 – 960 MHz) Antenna •915 MHz (779 – 960 MHz) Antenna •2440 MHz Antenna
•PCB Antenna
•Wire Antenna •Ceramic Chip Antenna
九族文化村
•CC-Antenna-DK
•Dual Band Antenna (868 & 2440 MHz) •Mitsubishi Chip Antenna
•Pul Chip Antenna
分数加减法
•Helical Wire Antenna
•Pul Helical Wire Antenna
1 Introduction
The main purpo of the CC-Antenna-DK is to ea the decision for which type of low cost antenna can be implemented as well as give an estimation of the performance that can be achieved.
The frequency range of the antennas is from 136 MHz to 2480 MHz. The A4 sized PCB panel contains 16 different boards;
13 antenna designs and 3 boards for calibration purpos. Each board has been v-cut and can be snapped out of the PCB panel.
All antennas are tuned for connecting to an EM board on the EB platform. A matching network is ud on each antenna design so the antenna boards can matched for other GND sizes than the EB board.
Additionally, the ambition with this document is to collect the various antenna measurements that have been performed and to compare the results obtained in an overview format. Terminology, antenna characteristics, fundamentals of antenna design, and measurement procedures are covered in the Antenna Selection Guide [18]. For each antenna, a CTIA measurement summary is provided in this report with a link to the full measurement CTIA report. DN6xx is designated for CTIA measurement reports.
Choosing the correct antenna for the application is crucial if the optimum range is to be achieved. Similarly, for a given distance, the power can be reduced on the transmitter side if the optimum antenna is chon.亲爱的女孩
Antennas are categorized under the operating frequency (169 MHz, 315 MHz, 433 MHz, 868 / 915 MHz or 2.44 GHz) and then the type of antenna (PCB Antennas, Chip Antennas, and Wire Antennas). The main focus is on PCB, Wire and Chip antennas, since the are mainly ud in high volume products.
3 CC-Antenna-DK Rev 1.0.0.
Description
3.1 Board
The CC-Antenna-DK PCB panel contains 16 different boards; 13 antenna designs and 3 boards for calibration purpos. Each board has been v-cut and can be snapped out of the PCB panel, shown in Figure 1.
Each board has a height of 95 mm and a width of 20 mm to 45 mm. The PCB is 1.6 mm thick and ha
s a dielectric of 4.2.
The schematic (PDF), layout (PDF and gerbers), PCB stack-up (PDF) are provided in the CC-Antenna-DK documentation in the zip file [19].
Figure 1: CC-Antenna-DK Board Showing Top Metal Layer, Silkscreen and V-cut Track
All Low Power Wireless chips have their own specific reference designs. Each reference design is implemented on an Evaluation Module (EM). Figure 2 shows a typical EM that is ud for CC2500 ref design.
Figure 2. Picture of CC2500 Evaluation Module (EM)
The EM board is inrted onto the main Evaluation Board platform so the reference design implemented on the EM can be evaluated. The EM board is inrted onto the top, right side of the SmartRF04EB board as can be en in Figure 3.
火刘
长方形英语Figure 3. Picture of SmartRF04EB Evaluation Board (EB)
All antennas have been measured and tuned for connecting to an EM board inrted onto an EB board unless other specified; this is illustrated in Figure 4.
Figure 4: Connectivity of Antenna Board #6 to a CC1101 EM Board on the EB Platform
红酒名字A matching network is ud on each antenna design so the antenna boards can matched for other GND sizes than the E
B board, refer to Figure 5.
Figure 5: CC-Antenna-DK Panel Picture
Sections 3.1.1 to 3.1.16 show the top metal layer in blue and the bottom layer in red.
The efficiency of the antenna (>868 MHz) is normally incread when ud as a stand alone board. The lower frequencies (<433 MHz) require a larger GND plane / antenna to achieve high total radiated power (TRP).
Two types of antenna (board 6, 3.1.6 and board 7, 3.1.7) have been chon to illustrate that the TRP is incread when ud as a stand alone compared to using the antennas on the EM & EB platform.
3.1.1 Board #1: “Short” Calibration Board
Figure 6: Board #1 – “Short” Calibration Board
Size Width (mm) Height (mm)
PCB Board 20 95
63
GND 18
寝室介绍BOM Ref. Designator Part Number Value
久而久之的意思- - - Table 1: PCB Size and BOM for Board #1 – “Short” Calibration Board
Three boards have been provided for calibration purpos; OPEN (3.1.9), SHORT (3.1.1), and
50 ohm LOAD (3.1.2). The boards are mainly ud when working with a network analyzer.
