PcB - High Frequency Electronics

More documents

Recommendations

Info

High Frequency Design Satellite Data Transmission Figure 5 • PRBS spectrum in hot cycle. schemes, transmit antenna gain, slant angles and corresponding atmospheric loss over distance, receive antenna and amplifier gains and noise factors, cable losses, interference levels and climatic attenuation factors must be taken into account. In order to accommodate the known performance deviations and also unknown effects of various parameters in the RF link chain, onboard power is suitably increased to provide comfortable system margin Transmitter frequency Modulation Data rate Transmitter output power Onboard loss On-board antenna gain EIRP 8125/ 8300 MHz QPSK 2 X 52.5 Mbps 16.0 dBW 2.0 dB 5.0 dBi 19.0 dBW Figure 6 • 1010… spectrum in hot cycle. (> 3dB) for receiving the data with acceptable Bit Error Rate (BER= 1x10 -6 for space links). Table 1 gives the link calculation for data transmission in the X-band. The link has been designed to ensure a BER better than 1 x 10 -6 for an elevation angle of 5º. For the Resourcest-2 satellite, in a near circular orbit with an altitude of 817 km, the maximum slant range for 5º elevation is 2820 Km. An EIRP of 19 dBW has been found adequate to provide sufficient link margins. The theoretical value of E b /N 0 required for achieving a bit error rate (BER) of 1 x 10 -6 is 10.8. The received carrier to noise density ration (CNDR) is 97.8 dB-Hz. The available E b /N 0 works out to be 17.6 dB leading to a link margin of 4.8 dB taking 2 dB implementation margin. The implementation margin takes into account link impairment parameters such as amplitude imbalances in the modulator, clock instability, data asymmetry, rise time, filtering, group delay distortion in amplifier and Orbit height 817 Kms Elevation 5° Slant Range Path loss Miscellaneous loss Ground Station G/T Received CNDR E b /N o available Required E b /N o Implementation margin Margin available TABLE 1 • Link Estimate 40 High Frequency Electronics 2820.6 Km 179.8 dB 1.0 dB 31.0 dB/°K 97.8 dB-Hz 17.6 dB 10.8 dB 2.0 dB 4.8 dB Figure 7 • LISS III PRBS spectrum.
www.highfrequencyelectronics.com High Frequency Electronics magazine An effective advertising medium to reach design engineers · Respected technical content · Professionally edited and presented material · Business and technology news · Conference and short course calendar · New product announcements · Online Edition (PDF) identical to print edition www.highfrequencyelectronics.com Use online ads for a combined online-print presence · Subscriber services — subscriptions & renewals · Complete archives of all past technical articles, reports, tutorials, editorials · Advertiser information and ad material specifications · HFeLink quick access to industry web sites · Ready to add new capabilities Special Services Use our expertise in print and electronic media · Article reprints, catalogs, brochures · Mail list rental · Trade show promotions & literature distribution · Newsletter and promotional e-mails · Other needs? Just ask! ADVERTISING SALES — EAST COAST Gary Rhodes Tel: 631-274-9530, Fax: 631-667-2871 grhodes@highfrequencyelectronics.com ADVERTISING SALES — WEST Tim Burkhard Tel: 707-544-9977, Fax: 707-544-9375 tim@highfrequencyelectronics.com ADVERTISING SALES — CENTRAL Keith Neighbour Tel: 773-275-4020, Fax: 773-275-3438 keith@highfrequencyelectronics.com PUBLISHER — OTHER REGIONS & INTERNATIONAL Scott Spencer Tel: 603-472-8261, Fax: 603-471-0716 scott@highfrequencyelectronics.com
Page 1 and 2: ALSO PUBLISHED ONLINE: www.highfreq
Page 3 and 4: 3-year warranty applies to rack-mou
Page 5 and 6: COMPLIANT 90° SPLITTERS 5 MHz to 8
Page 8 and 9: EDITORIAL Vol. 11 No. 8, August 201
Page 10 and 11: MEETINGS & EVENTS Conferences Augus
Page 12 and 13: MEETINGS & EVENTS vides an introduc
Page 14 and 15: IN THE NEWS Raytheon Company was aw
Page 16 and 17: IN THE NEWS College of Technology a
Page 18 and 19: High Frequency Products FEATURED PR
Page 20: High Frequency Products FEATURED PR
Page 23 and 24: QUALITY, PERFORMANCE AND RELIABILIT
Page 25 and 26: The Difference Starts with the Cabl
Page 27 and 28: 30 day MONEY-BACK GUARANTEE! Try it
Page 29 and 30: Industry pros are talking about us
Page 32 and 33: High Frequency Design PCB Probing T
Page 34 and 35: High Frequency Design PCB Probing f
Page 36 and 37: High Frequency Design PCB Probing p
Page 38 and 39: High Frequency Design Satellite Dat
Page 46 and 47: Design Notes & Market Reports Femto
Page 48 and 49: High Frequency Products NEW PRODUCT
Page 54 and 55: Product Highlights Isolator RFMW an
Page 59 and 60: COMPLIANT POWER SPLITTERS COMBINERS
Page 61 and 62: Product Highlights Detector RLC Ele
Page 63 and 64: Product Highlights LTE App Notes Th
Page 65 and 66: Product Highlights FPGA Software Na
Page 67 and 68: The choice is clear for all your RF

PcB - High Frequency Electronics

Create successful ePaper yourself

Delete template?

Save as template?