it dose not aﬀect the performance of the cavity duplexer. 4. CONCLUSION On the base of the design of the general Chebyshev band-pass ﬁlter with ﬁnite transmission zeros,the coaxial resonator cavity duplexer in Fig. 5 is designed and realized in this paper. The measured results in Fig. 6 approximately meet all the conditions of the design ... Duplexer, 4 cavity mobile, 4.5 to 10 MHz separation, 126-174 MHz MR256 6 Cavity Compact VHF Mobile Duplexer
It was decided to construct eleven (11) duplexers. With 6 cavity filters in each duplexer this required 66 full size 2 metre cavity filters to be constructed. A very ambitious project to say the least. The outside tube is 4" copper and the inside tube 1 and 3/8".
DXF150 is a 6-cavity VHF150 MHz duplexer for duplex transceivers. The Duplexer is a compact unit intended for equipment. Comes in two versions low (L) and high (H) Possible to operate on several multi-channels on TX and RX. DXF150 provide superior performance and may also be used as low-power base station duplexer The DPF 70/4… is a 4-cavity duplex filter for duplex radiotelephones. The DPF 70/4… can be adjusted within the complete 406 - 470 MHz band. The duplexer can be delivered in four different versions according to required duplex spacing. See also “Ordering information” below. The DPF 70/4… is primarily intended for equipment, where the ...
A duplexer is an electronic device that allows bi-directional communication over a single path.In radar and radio communications systems, it isolates the receiver from the transmitter while permitting them to share a common antenna. vhf 4-cavity high rejection bpbr duplexer 136-174 mhz 90 db isolation 600khz sep - $650.00. wacom wp-641 vhf duplexer 136-174mhz range 8 inch duplexer-wow big cans see pictures band-pass/band-reject with 90 db isolation at 600khz 1.7 db loss on rec and tx 250 watt power ration good for ham repeaters 2 cavities are atached buy vinal banding see pictures of duplexers will do 600khz seperation ...
Page 77: Replacing The Mts 4 Duplexer Applicant: Motorola Solutions Equipment Type: ABZ89FC5827 / 109AB-5827 Radio Frequency Distribution System | 249 Replacing the MTS 4 Duplexer Process: 1 Remove the Duplexer. Removing the MTS 4 Duplexer on page 249. 2 Insert the Duplexer into the filter tray. It requires a tone-squelch access of 151.4 as all 900 Mhz repeaters are tone-squelch machines. The duplexer on this machine is a 2 cavity decibel products unit, and the machine delivers 80 watts out of the duplexer to the antenna.
BL-14N Duplexer 800 CDMA Tx 869-894 R x 824-849 60W Type N
Description. Duplexer utilizes four high-Q notch-type coaxial resonators with 4"-cross-section. The resonators are made of extruded aluminum passivated inside and outside and then vinyl coated. The proper way to tune a cavity or a duplexer is to use 6 dB or 10 dB 50 ohm pads between the test equipment and the cavity or endmost duplexer can, as that ensures that pad "masks" any non-50-ohm-impedance in your test equipment and ensures that the duplexer is really tuned to precisely 50 ohms. Next we saw that duplexer filters are a special type of LC filter, the cavity resonator and that they are equivalent to a parallel tuned circuit. Then we saw that the filters in a duplexer are a specially-shaped cavity resonator, a quarter-wavelength of transmission line, shorted at one end.
of parts inside of the cavity resonators, field repair is not recommended. TUNING Vari-Notch duplexers are originally pre-tuned at the factory to the customers specification. To re tune the duplexer, each resonant cavity must be separated from the group and adjusted individu ally. Then the individual cavities are re-connected
Tiny Cavity Duplexer Serves Cellular Systems. The model AD850-931D202 cavity duplexer from Anatech Electronics is designed for filtering cellular transmit and receive signals within the same unit. It provides two passbands, from 806 to 824 MHz and from 902 to 905 MHz, with better than 85-dB ...
Sinclair VHF RES-LOK Duplexer Q-Circuit 4 cavity rack mount 406-512 MHz, Q3220E. $599.99 +$79.05 shipping.
1 Center Frequency(F0) 1542.5MHz 1622.5MHz 2 Pass Band Frequency 1520 ~ 1565MHz 1610 ~ 1635MHz 3 Pass Band Insertion Loss ≤1.5dB ≤1.5dB 4 Pass Band VSWR ≤1.3:1 ≤1.3:1 5 Stop Band Rejection ≥50dB @ 1610 ~ 1635MHz ≥50dB @ 1520 ~ 1565MHz 6 Impedance 50 Ohms 7 Power 30W Max. UHF Talkie Walkie 25W 6 Cavity SGQ-889 Duplexer Repeater SL16/UHF-M Connector $ 126.00 $ 81.99 Sold By: Two Way Radio Add to cart; Sale! 25W SL16 BNC 6 Cavity UHF Duplexer for Ham Radios Repeater Duplexer $ 118.00 $ 82.00 Sold By: Two Way Radio Add to cart; Sale! Repeater Base Station Duplexer 50W N-connector UHF 6 Cavity Duplexer
CTS has developed high-reliability surface-mounted and ceramic cavity waveguide ceramic filters. These product families offer versions for all of the major frequency bands while sharing a common printed circuit board (PCB) layout, enabling a platform solution. We offer a range of duplexer performance to better than 80dB of rejection and