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Home My WebLink AboutAttachment 22-Letter Regarding Concealed Antenna Monopole C Squared Systems, LLC 65 Dartmouth Drive Auburn, NH 03032 Phone: (603) 644 2800 support@csquaredsystems.com July 6, 2022 Jeffrey Ribeiro Regulator Planner Cape Cod Commission 3225 Main Street P.O. Box 226 Barnstable, Massachusetts 02630 SUBJECT: Centerville Gardens Wireless Communication Tower (CCC No. 22006) -36 Wequaquet Lane, Centerville and 1060 Falmouth Road, Hyannis, MA (the “Site”) – Concealed Antenna Monopole “CAM”) Dear Mr. Ribeiro: This letter is in Support of Application for a Development of Regional Impact related to Crown Castle’s proposed tower at the Site. The letter discusses the disadvantages of installing antennas inside a CAM or a stealth monopole commonly referred to as a flagpole or unipole. Due to equipment and operational requirements, a CAM is not feasible in this instance for addressing the carriers’ network requirements. All wireless carriers not only use multiple frequencies but also various technologies that are incompatible with the constraints inherent to the installation of antennas and equipment inside of a CAM. This limitation is only exacerbated by the complex wireless usage that increasingly consists of data rather than voice service. The demand for data has grown exponentially over the years and continues to constantly grow. Below is a graph and excerpt from a white paper which further demonstrates this growth: C Squared Systems, LLC 65 Dartmouth Drive Auburn, NH 03032 Phone: (603) 644 2800 support@csquaredsystems.com “The U.S. commercial wireless industry cannot meet this explosive growth simply through improved engineering,” https://api.ctia.org/docs/default-source/default-document-library/062115mobile-data-demands- white-paper-new.pdf https://www.statista.com/statistics/1133837/north-america-monthly-data- traffic/#:~:text=The%20monthly%20data%20traffic%20in,almost%205%20EB%20per%20month. Note: There are 1,000 terabytes in a petabyte, 1,000 petabytes in an exabyte. Additionally, there are other reasons why a CAM is not an option in this instance including: Multiple antenna center lines (ACL) are required by each carrier to install a minimum of two (2) antennas per sector. Due to the limited space inside a CAM, antennas have to be installed flush mount to the pole inside the structure, making it possible for only 1 antenna per sector to be installed (see below). Additional space is also required for other equipment to be installed inside the CAM, increasing the required vertical separation between two (2) ACLs from 10ft to 12ft. C Squared Systems, LLC 65 Dartmouth Drive Auburn, NH 03032 Phone: (603) 644 2800 support@csquaredsystems.com Carriers need to install and run bulky co-axial cables from inside the pole since radios cannot fit in the stealth structure. Most antennas used by carriers have an average of twelve (12) ports nowadays so carriers may need to install six (6) to twelve (12) runs of coaxial cable for each antenna. The typical diameter* of a coaxial cable is 7/8” to 1-5/8”. *(cable diameter depends on distance between radio equipment on the ground to bottom of the antennas on the tower). Antenna Centerline is 12’ between two carriers C Squared Systems, LLC 65 Dartmouth Drive Auburn, NH 03032 Phone: (603) 644 2800 support@csquaredsystems.com For example, if AT&T installs six (6) antennas at two (2) different ACL heights inside the CAM, they may need to install a total of at least 36 runs of coaxial cables (see below table) Antennas are also much larger than a decade ago. Carriers typical install antennas that are about eight (8) feet long and two (2) feet wide. These antennas are now capable of supporting more hardware and handling more traffic than in the past. A CAM diameter would have to be wide enough to accommodate all of the antennas and the cable runs. If active components are installed in the CAM, then a cooling mechanism must also be put in place to prevent overheating of the equipment. Further expansion or modification of carrier installation becomes impractical due to limited space restricting additional hardware. We have concluded that by utilizing the proposed tower at the Site at the specified centerline height of 95-feet for AT&T for both 700 MHz and 1900 MHz LTE service, AT&T will be able to provide significant coverage improvements in the area surrounding the Site in Barnstable. Sincerely, Sohail Usmani RF Engineer C Squared Systems 64766418 v2-WorkSiteUS-028033/0017 Carrier Sector 1 Sector 2 Sector 3 Total/Carrier * AT&T 12 12 12 36 Verizon 12 12 12 36 T-Mobile 12 12 12 36 Dish Wireless 12 12 12 36 144 Co-Axial Cable Requirement * Calculations assume 2 rad centers for each carrier & 6 cables per antenna Grand Total: